docs: update reference to setting input env variables

action.yml

@@ -221,7 +221,7 @@ runs:
         GITHUB_ACTION_PATH: ${{ github.action_path }}
         GITHUB_WORKSPACE: ${{ github.workspace }}
         # INPUT_<VARIABLE_NAME> is not available in Composite run steps
-        # https://github.community/t/input-variable-name-is-not-available-in-composite-run-steps/127611
+        # https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#example-specifying-inputs
         INPUT_FILES_PATTERN_FILE: ${{ steps.glob.outputs.paths-output-file }}
         INPUT_SEPARATOR: ${{ inputs.separator }}
         INPUT_PATH: ${{ inputs.path }}