Alpha builds workflow: try to address a JSON parsing error

Author: michaelklishin

.github/workflows/alpha-build.yaml

@@ -27,14 +27,4 @@ jobs:
             -H "Authorization: Bearer ${{ secrets.RABBITMQCI_BOT_TOKEN }}" \
             -H "X-GitHub-Api-Version: 2022-11-28" \
             https://api.github.com/repos/${{ env.DEV_WORKFLOW_REPOSITORY }}/dispatches \
-            -d '{ \
-           "event_type": "new_4.1.x_alpha", \
-           "client_payload": { \
-              "release_repository": "rabbitmq/${{ env.DEV_WORKFLOW_REPOSITORY }}", \
-              "release_description": "Built from https://github.com/rabbitmq/rabbitmq-server/commit/${{ github.sha }} at ${{ env.PRERELEASE_TIMESTAMP }}", \
-              "prerelease": true, \
-              "prerelease_kind": "alpha",\
-              "prerelease_identifier": "${{ env.PRERELEASE_IDENTIFIER }}",\
-              "prerelease_title": "RabbitMQ alpha build, timestamp: ${{ env.PRERELEASE_TIMESTAMP }}, version: 4.1.0-alpha.${{ env.PRERELEASE_IDENTIFIER }}",\
-              "base_version": "4.1.0"
-            }}'
+            -d '{ "event_type": "new_4.1.x_alpha", "client_payload": {"release_repository": "${{ env.DEV_WORKFLOW_REPOSITORY }}", "release_description": "Built from https://github.com/rabbitmq/rabbitmq-server/commit/${{ github.sha }} at ${{ env.PRERELEASE_TIMESTAMP }}", "prerelease": true, "prerelease_kind": "alpha", "prerelease_identifier": "${{ env.PRERELEASE_IDENTIFIER }}", "prerelease_title": "RabbitMQ alpha build, timestamp: ${{ env.PRERELEASE_TIMESTAMP }}, version: 4.1.0-alpha.${{ env.PRERELEASE_IDENTIFIER }}", "base_version": "4.1.0" }}'