ci: create coverage badge

.github/workflows/go.yml

@@ -37,4 +37,15 @@ jobs:
       with:
         # Configure action by specifying input parameters individually (option 2)
         profile: cover.out
-        threshold-total: 95
+        threshold-total: 95
+
+    - name: make coverage badge
+      uses: action-badges/core@0.2.2
+      # if: contains(github.ref, 'main')
+      with:
+        label: coverage
+        message: ${{ steps.coverage.outputs.badge-text }}
+        message-color: ${{ steps.coverage.outputs.badge-color }}
+        file-name: coverage.svg
+        badge-branch: badges ## orphan branch where badge will be committed
+        github-token: "${{ secrets.GITHUB_TOKEN }}"