chore(charts): explicitly reference docker.io (#28025)

**Description**
This ensures docker.io is explicitly referenced as a container source,
instead of relying on container-engine defaults

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [x] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [x] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning
- [ ] I made sure the title starts with `feat(chart-name):`,
`fix(chart-name):` or `chore(chart-name):`

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

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charts/stable/minecraft-java/values.yaml

@@ -1,57 +1,57 @@
 image:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2@sha256:8bd119f65ef6e65bdb12f756bfb44a305b36b1adf868ade8027014fabc29c755
   pullPolicy: Always
 j21Image:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java21@sha256:8bd119f65ef6e65bdb12f756bfb44a305b36b1adf868ade8027014fabc29c755
   pullPolicy: Always
 j21graalvmImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java21-graalvm@sha256:c49022d3453160e94cbe21785c8cb0e56659e4b221d4cf093d969841585bd6d8
   pullPolicy: Always
 j21alpineImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java21-alpine@sha256:f603d1c14f820b835bc5453fe9b1ea604f50f4090812ed9fd5801786ff5c2834
   pullPolicy: Always
 j17Image:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java17@sha256:db3ccc7db5371a7a4e7edf8696ccfa177f4b71a29ffbecc76e21a663d1bcf98d
   pullPolicy: Always
 j17jdkImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.6.1-java17-jdk@sha256:2c43fcede436aff9f50b1adf4448d55d221651be471ef41412232c141bfa89f6
   pullPolicy: Always
 j17graalvmImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java17-graalvm@sha256:1cc2b742e1ad59e7825bd3aae983e62caa4f2a3518db40214c7eb33af7cb0411
   pullPolicy: Always
 j17alpineImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java17-alpine@sha256:64a5293d322b4eb9d3a0626a502e7dfd4b1e8a7826bda460c2cbc2b57d723e57
   pullPolicy: Always
 j11Image:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java11@sha256:55aba151b38675a08ca21d9b463f2bdbefadbef741cd61be8481d61cdf82ae59
   pullPolicy: Always
 j8Image:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java8@sha256:46863b4193f240514c802de7295edbd9ea54a46b2b49d59e052462157f7d1ff4
   pullPolicy: Always
 j8graalvmImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java8-graalvm-ce@sha256:5ffa3a407cc39ae55d6173d13da9f08189e6648329146a8a1c7a0c74f4b62307
   pullPolicy: Always
 j8jdkImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.10.2-java8-jdk@sha256:48fa0f501868df91d2bf855831977a9ef0416dc64fd13ec0eb9b916b1d8cb919
   pullPolicy: Always
 j8alpineImage:
-  repository: itzg/minecraft-server
+  repository: docker.io/itzg/minecraft-server
   tag: 2024.9.0-java8-alpine@sha256:ee8505b9670a82b7703ec35b2a87fe9b7f7823b50ae50fad18bf1fe511e577f9
   pullPolicy: Always
 mcBackupImage:
-  repository: itzg/mc-backup
+  repository: docker.io/itzg/mc-backup
   tag: latest@sha256:b40aebf4f089b373495c92483c7990222560977b5e703de507733401b38456f8
   pullPolicy: Always