add codecov

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.github/workflows/autoapprove.yml

@@ -3,6 +3,10 @@ name: "autoapprove"
 on:
   pull_request_target:
     types: [assigned, opened, synchronize, reopened]
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
 
 permissions:
   pull-requests: write
@@ -17,4 +21,4 @@ jobs:
         if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
         id: approve
         with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}