chore(helm): update image ghcr.io/drakkan/sftpgo v2.6.4 → v2.6.5 (#31740)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/drakkan/sftpgo](https://redirect.github.com/drakkan/sftpgo) |
patch | `9c21aeb` -> `ef91c4f` |

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### Release Notes

<details>
<summary>drakkan/sftpgo (ghcr.io/drakkan/sftpgo)</summary>

###
[`v2.6.5`](https://redirect.github.com/drakkan/sftpgo/releases/tag/v2.6.5)

[Compare
Source](https://redirect.github.com/drakkan/sftpgo/compare/v2.6.4...v2.6.5)

#### New Features

-   EventManager: added placeholders for year, month, day, hour, minute.
- Data provider: added link to upgrade documentation if upgrade fails
because version is too old.

#### Bug Fixes

- rsync: enforce a supported format and limit the allowed options.
[CVE-2025-24366](https://redirect.github.com/drakkan/sftpgo/security/advisories/GHSA-vj7w-3m8c-6vpx).
Thanks to [@&#8203;ateamjkr](https://redirect.github.com/ateamjkr) for
reporting.
-   WebUIs: fix for scrollbar not displaying in navigation sidebar.

</details>

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charts/stable/sftpgo/Chart.yaml

@@ -6,7 +6,7 @@ annotations:
   truecharts.org/min_helm_version: "3.11"
   truecharts.org/train: stable
 apiVersion: v2
-appVersion: 2.6.4
+appVersion: 2.6.5
 dependencies:
   - name: common
     version: 25.4.10
@@ -33,4 +33,4 @@ sources:
   - https://github.com/drakkan/sftpgo
   - https://github.com/truecharts/charts/tree/master/charts/stable/sftpgo
 type: application
-version: 8.5.1
+version: 8.5.2

charts/stable/sftpgo/values.yaml

@@ -1,7 +1,7 @@
 image:
   pullPolicy: IfNotPresent
   repository: ghcr.io/drakkan/sftpgo
-  tag: v2.6.4-plugins@sha256:9c21aeb99be0fe911c426267cb0bf357a2aec77e30ffef77f121713b1b9f87bb
+  tag: v2.6.5-plugins@sha256:ef91c4f2c28c1621d70a80996e6c659f2d97739fd43cb396eb04673519cbb13a
 securityContext:
   container:
     runAsNonRoot: false