Update caddy Docker tag to v2.11 (#4758)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| caddy | stage | minor | `2.10-alpine` -> `2.11-alpine` |

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Author: renovate[bot]

.docker/Dockerfile

@@ -4,7 +4,7 @@ ARG PHP_VERSION=83
 ARG UID=1000
 ARG USER=app
 
-COPY --from=caddy:2.10-alpine /usr/bin/caddy /usr/bin/caddy
+COPY --from=caddy:2.11-alpine /usr/bin/caddy /usr/bin/caddy
 
 RUN apk add --no-cache \
     php${PHP_VERSION} \