chore(container): update public.ecr.aws/docker/library/nextcloud:31.0.8-fpm docker digest to 5ff431a (#39497)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[public.ecr.aws/docker/library/nextcloud](https://hub.docker.com/_/nextcloud)
([source](https://redirect.github.com/nextcloud/docker)) | final |
digest | `c495ea3` -> `5ff431a` |

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containers/apps/nextcloud-fpm/Dockerfile

@@ -1,4 +1,4 @@
-FROM public.ecr.aws/docker/library/nextcloud:31.0.8-fpm@sha256:c495ea3af39d1f8b43044c6b7bdb46dd703ef7f2c681e25f6a7270f83eadbdd2
+FROM public.ecr.aws/docker/library/nextcloud:31.0.8-fpm@sha256:5ff431abb2cda9da98c1b2d4c4cbbd3c2ebb89a0595fe38c24050c6193be8a28
 
 # Adds SURY PHP repository (This is a workaround because IMAP php extension is no longer available in Debian Trixie)
 # https://github.com/nextcloud/docker/issues/2456