Merge pull request #1523 from gardener/8R0WNI3-slack

fix: Define `slack-token` as `secrets` parameter

Author: 8R0WNI3

.github/workflows/release.yaml

@@ -25,6 +25,12 @@ on:
           The secret-key for the `Gardener-GitHub-App` (`vars.GARDENER_GITHUB_ACTIONS_APP_ID`)
           If not passed (in which case calling workflows need to set `secrets: inherit`), defaults
           to `secrets.GARDENER_GITHUB_ACTIONS_PRIVATE_KEY`.
+      slack-token:
+        required: false
+        description: |
+          The auth-token to use to authenticate against slack. Only needed if `slack-channel-id` is
+          passed. For convenience, defaults to `secrets.SLACK_APP_TOKEN_GARDENER_CICD` (calling
+          workflows must set `secrets: inherit` for this to work.
     inputs:
       component-descriptor:
         required: false
@@ -94,13 +100,6 @@ on:
           Use `release-notes`-output if more control is desired.
 
           Note: see `slack-token` for authentication options.
-      slack-token:
-        required: false
-        type: string
-        description: |
-          The auth-token to use to authenticate against slack. Only needed if `slack-channel-id` is
-          passed. For convenience, defaults to `secrets.SLACK_APP_TOKEN_GARDENER_CICD` (calling
-          workflows must set `secrets: inherit` for this to work.
       github-release-notes-audiences:
         required: false
         type: string