Keep the ghcr.io/devture/ansible image in the docs up to date via Renovate

docs/ansible.md pins a ghcr.io/devture/ansible tag in its `docker run`
examples, which used to be bumped by hand. devture/docker-ansible now tags
releases automatically, so Renovate can propose them. The devcontainer's
Dockerfile, already seen by the dockerfile manager, gets updated in the same
pull request.

The image's tags (`<Alpine ansible package version>-<release>`) need regex
versioning: Docker versioning would treat `-r0-3` as a compatibility suffix
and never offer `-r0-4`.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

bin/renovate-smoke-test.sh

@@ -66,6 +66,11 @@ if ! jq --slurp --exit-status '
         and any(.packageFiles.regex[]?.deps[]?;
             .depName == "matrix-renovate-runner" and .datasource == "docker")
     )
+    and any(.[];
+        .msg == "Extracted dependencies"
+        and any(.packageFiles.regex[]?.deps[]?;
+            .depName == "ghcr.io/devture/ansible" and .datasource == "docker")
+    )
 ' "$log_file"; then
     echo 'Renovate did not complete dependency extraction successfully' >&2
     exit 1