chore(helm): update image ghcr.io/linuxserver/grocy digest to 21e77b4 (#32530)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/grocy](https://redirect.github.com/linuxserver/docker-grocy/packages)
([source](https://redirect.github.com/linuxserver/docker-grocy)) |
digest | `3882320` -> `21e77b4` |

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charts/stable/grocy/Chart.yaml

@@ -33,4 +33,4 @@ sources:
   - https://github.com/grocy/grocy
   - https://github.com/truecharts/charts/tree/master/charts/stable/grocy
 type: application
-version: 20.6.3
+version: 20.6.4

charts/stable/grocy/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: ghcr.io/linuxserver/grocy
-  tag: 4.4.1@sha256:3882320b535acd4b3475e0f550cec9beedfe75dbbb14778feb43ee59cbafb47e
+  tag: 4.4.1@sha256:21e77b400e12b6f797b3303fedba92eeca35fc10d17e157c7bf40431ac31fdcf
   pullPolicy: IfNotPresent
 service:
   main: