docs: update references to renovate/renovate (#10885)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

docs/usage/docker.md

@@ -227,7 +227,7 @@ To get access to the token a custom Renovate Docker image is needed that include
 The Dockerfile to create such an image can look like this:
 
 ```Dockerfile
-FROM renovate/renovate:25.53.3
+FROM renovate/renovate:25.56.5
 # Include the "Docker tip" which you can find here https://cloud.google.com/sdk/docs/install
 # under "Installation" for "Debian/Ubuntu"
 RUN ...

docs/usage/self-hosting.md

@@ -25,8 +25,8 @@ For example, all the following are valid tags:
 
 ```sh
 docker run --rm renovate/renovate
-docker run --rm renovate/renovate:25.53.3
-docker run --rm renovate/renovate:25.53
+docker run --rm renovate/renovate:25.56.5
+docker run --rm renovate/renovate:25.56
 docker run --rm renovate/renovate:25
 ```
 
@@ -62,7 +62,7 @@ spec:
             - name: renovate
               # Update this to the latest available and then enable Renovate on
               # the manifest
-              image: renovate/renovate:25.53.3
+              image: renovate/renovate:25.56.5
               args:
                 - user/repo
               # Environment Variables
@@ -121,7 +121,7 @@ spec:
       template:
         spec:
           containers:
-            - image: renovate/renovate:25.53.3
+            - image: renovate/renovate:25.56.5
               name: renovate-bot
               env: # For illustration purposes, please use secrets.
                 - name: RENOVATE_PLATFORM
@@ -463,7 +463,7 @@ spec:
           containers:
             - name: renovate
               # Update this to the latest available and then enable Renovate on the manifest
-              image: renovate/renovate:25.53.3
+              image: renovate/renovate:25.56.5
               volumeMounts:
                 - name: ssh-key-volume
                   readOnly: true