CI(release-dispatch): Fix workflow file

This (hopefully) fixes the syntax of the release dispatch workflow file.

.github/workflows/release_dispatch.yml

@@ -13,4 +13,5 @@ jobs:
               with:
                   token: ${{ secrets.DOCKER_REPO_ACCCESS_TOKEN }}
                   event-type: new_release
-                  client_payload: '{ "tag": "${{ github.event.release.tag_name }}", "is_latest": "${{ github.event.release.commitish == "master" }}" }'
+                  client_payload: >
+                      { "tag": "${{ github.event.release.tag_name }}", "is_latest": "${{ github.event.release.commitish == 'master' }}" }