ci: fix release please (#996)

Set `release-type` as we removed configs in #995.

Author: ishymko

.github/workflows/release-please.yml

@@ -16,3 +16,4 @@ jobs:
       - uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38 # v4
         with:
           token: ${{ secrets.A2A_BOT_PAT }}
+          release-type: python