test: clarify temporary Micrometer compatibility path

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.github/workflows/micrometer-compatibility.yml

@@ -20,11 +20,14 @@ jobs:
             # renovate: datasource=github-releases depName=micrometer-metrics/micrometer packageName=micrometer-metrics/micrometer
             ref: v1.16.5
           - name: typed-descriptor
+            # TODO: remove this temporary opt-in leg once Micrometer switches the
+            # Prometheus client integration to typed descriptors by default.
+            # Follow-up: https://github.com/prometheus/client_java/issues/2182
             repository: zeitlinger/micrometer
             # renovate: datasource=git-refs depName=zeitlinger/micrometer packageName=https://github.com/zeitlinger/micrometer currentValue=feat/prometheus-client-opt-in
             ref: 1af1b3185058941eea57dc467bfe0df5a4786fe4
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
       - uses: jdx/mise-action@1648a7812b9aeae629881980618f079932869151 # v4.0.1