changelog: a path input for a checkout that is not the workspace itself

decePubClient fetches itself into a folder of its own.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

changelog/action.yml

@@ -1,6 +1,9 @@
 name: Release notes
 description: What changed since the previous tag, from the commit messages, in every format a release needs; optionally on the Releases tab
 inputs:
+  path:
+    description: The git checkout to read, relative to the workspace
+    default: .
   prefix:
     description: The tag prefix of this kind of release (v, app-v, server-v)
     default: v
@@ -45,6 +48,7 @@ runs:
       shell: bash
       env:
         RELEASE_TOKEN: ${{ inputs.token }}
+        NOTES_PATH: ${{ inputs.path }}
         NOTES_PREFIX: ${{ inputs.prefix }}
         NOTES_TAG: ${{ inputs.tag }}
         NOTES_NAME: ${{ inputs.name }}
@@ -54,7 +58,7 @@ runs:
         NOTES_OUTPUT: ${{ inputs.output }}
         NOTES_RELEASE: ${{ inputs.release }}
       run: |
-        args=(--repo . --prefix "$NOTES_PREFIX" --name "$NOTES_NAME" --strip "$NOTES_STRIP" --packager "$NOTES_PACKAGER" \
+        args=(--repo "$NOTES_PATH" --prefix "$NOTES_PREFIX" --name "$NOTES_NAME" --strip "$NOTES_STRIP" --packager "$NOTES_PACKAGER" \
           --history "$NOTES_HISTORY" --out "$NOTES_OUTPUT")
         [ -n "$NOTES_TAG" ] && args+=(--tag "$NOTES_TAG")
         [ "$NOTES_RELEASE" = "true" ] && args+=(--release)