Add coverage export workflow

Author: oxy-rostyslav

.github/workflows/export_coverage.yml

@@ -7,8 +7,8 @@ on:
     workflows: ["lint_and_test.yml"]
     types:
       - completed
-#    branches: # Only run for completions on these branches of the source workflow
-#      - update-readme # Or your primary development branch
+    branches: # Only run for completions on these branches of the source workflow
+      - update-readme # Or your primary development branch
 
 jobs:
   export-coverage: