chore: switch to release-please app (GoogleCloudPlatform#584)

Author: jackwotherspoon

.github/workflows/release-please.yml renamed to .github/release-please.yml

@@ -12,17 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-name: release-please
-on:
- push:
-   branches:
-     - main
-jobs:
- release-please:
-   runs-on: ubuntu-latest
-   steps:
-     - uses: GoogleCloudPlatform/[email protected]
-       with:
-         token: ${{ secrets.GITHUB_TOKEN }}
-         release-type: python
-         package-name: cloud-sql-python-connector
+handleGHRelease: true
+packageName: cloud-sql-python-connector
+releaseType: python