DEV: Chain workflows

Author: MartinThoma

.github/workflows/create-github-release.yaml

@@ -5,6 +5,10 @@ on:
     tags:
       - '*.*.*'
   workflow_dispatch:
+  workflow_run:
+    workflows: ["Create git tag"]
+    types:
+      - completed
 
 permissions:
   contents: write

.github/workflows/publish-to-pypi.yaml

@@ -5,6 +5,10 @@ on:
     tags:
       - '*.*.*'
   workflow_dispatch:
+  workflow_run:
+    workflows: ["Create git tag"]
+    types:
+      - completed
 
 permissions:
   contents: write