.github: update action-manifest SHA

Use the latest.

Signed-off-by: Martí Bolívar <[email protected]>

Author: mbolivar-nordic

.github/workflows/manifest.yml

@@ -17,7 +17,7 @@ jobs:
           fetch-depth: 0
 
       - name: Manifest
-        uses: zephyrproject-rtos/action-manifest@v1.1.0
+        uses: zephyrproject-rtos/action-manifest@2f1ad2908599d4fe747f886f9d733dd7eebae4ef
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           manifest-path: 'west.yml'