Update google-github-actions/get-secretmanager-secrets action to v2 (#36

)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/release_forge.yaml

@@ -39,7 +39,7 @@ jobs:
           gpg --import "${HOME}/pgp_public.pub"
       - name: Get credentials
         id: get-secrets
-        uses: google-github-actions/get-secretmanager-secrets@v1
+        uses: google-github-actions/get-secretmanager-secrets@v2
         with:
           secrets: |-
             key_id:kotori316-mods-resources/signing-key-id