ci: fix notification workflows used during releases (#3157)

The event send by the "npm publish" workflow was incorrect, it didn't
correctly integrate the configuration tested in the playground
repository.
The workflow notifying the R package included 2 issues
  - the internal action wasn't checkout
  - the name of the target repository contained a typo

The problems above have impacted the release of version `0.44.0`.
Running the fixed workflow manually fixed the problems for this
particular release.

.github/workflows/notify-new-version-available-on-npm.yml

@@ -18,8 +18,10 @@ jobs:
     strategy:
       matrix:
         repository:
-          - bpmn-visualization-R'
+          - bpmn-visualization-R
     steps:
+      # Need to checkout to access to the internal action
+      - uses: actions/checkout@v4
       - name: Notify that a new bpmn-visualization version is available
         uses: ./.github/actions/notify-PA-repo-of-new-version
         with:

.github/workflows/publish-npm.yml

@@ -23,7 +23,7 @@ jobs:
         with:
           # use the default GITHUB_TOKEN, this is possible because we are dispatching the same repository
           event-type: new_version_available_on_npm
-          client-payload: '{ "version": "${{ inputs.version }}" }'
+          client-payload: "{ version: ${{ inputs.version }} }"
       - name: Send message to Slack channel
         if: success()
         uses: slackapi/[email protected]