chore(deps): update ghcr.io/containerbase/base docker tag to v13.5.6

| datasource | package                    | from   | to     |
| ---------- | -------------------------- | ------ | ------ |
| docker     | ghcr.io/containerbase/base | 13.5.5 | 13.5.6 |

Dockerfile

@@ -3,7 +3,7 @@ ARG RENOVATE_VERSION=39.86.0
 
 # Base image
 #============
-FROM ghcr.io/containerbase/base:13.5.5@sha256:b65aebe9e5536561185841e030f822fd7ba4266ef8fcc5680b00f0d48cb441f9 AS base
+FROM ghcr.io/containerbase/base:13.5.6@sha256:64cad7a020da9e0fb6b3496fade83216714513dc42cd3128b6328c5d15d7c5a8 AS base
 
 LABEL maintainer="Michael Kriese <[email protected]>"
 LABEL name="renovate"