ci: add deployment step to dev deploy workflow

Author: ahickmann-gds

.github/workflows/txma-mock-dev-deploy.yml

@@ -15,6 +15,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 30
     permissions:
+      id-token: write
       contents: read
     env:
       SAM_CLI_TELEMETRY: 0