Send send-musl-release-event events to library-documentation-action r…

…epository

We are going to stop doing manual versions of the action and start doing ones
based on each release of ponyc so that libraries can stay automatically up-to-date.

.github/workflows/cloudsmith-package-sychronised.yml

@@ -274,6 +274,7 @@ jobs:
     strategy:
       matrix:
         repo:
+          - ponylang/library-documentation-action
           - ponylang/shared-docker
     steps:
       - name: Send