chore(helm): update humhub (#28772)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/mriedmann/humhub-nginx | digest | `9496775` -> `2823d28` |
|
[ghcr.io/mriedmann/humhub-phponly](https://redirect.github.com/mriedmann/humhub-docker)
| digest | `1bc3dbd` -> `7139440` |

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charts/stable/humhub/Chart.yaml

@@ -47,4 +47,4 @@ sources:
   - https://ghcr.io/mriedmann/humhub-phponly
   - https://github.com/truecharts/charts/tree/master/charts/stable/humhub
 type: application
-version: 9.9.5
+version: 9.9.7

charts/stable/humhub/values.yaml

@@ -1,11 +1,11 @@
 image:
   pullPolicy: IfNotPresent
   repository: ghcr.io/mriedmann/humhub-phponly
-  tag: 1.16.1@sha256:1bc3dbd5c606792ad82727d6711b779b2171507232584cb60be6350e551783a2
+  tag: 1.16.1@sha256:7139440b6bc6daae1400408a9e0a9216749db4779a5d1e22dfb88caf80b9fac8
 nginxImage:
   pullPolicy: IfNotPresent
   repository: ghcr.io/mriedmann/humhub-nginx
-  tag: 1.16.1@sha256:949677571c616181810274fa7d065ac18e75ec16a2ce0d10a42d57312db9bec7
+  tag: 1.16.1@sha256:2823d2840d16e511a0111d9745ddfa53b98a4ebbcc70f788463b826ac2c65a20
 
 securityContext:
   container: