chore: use branch name in the workflow

Signed-off-by: gatici <gulsum.atici@canonical.com>

.github/workflows/main.yaml

@@ -22,6 +22,6 @@ jobs:
     uses: ./.github/workflows/integration_tests.yaml
 
   publish:
-    if: github.ref_name == 'main'
+    if: github.ref_name == 'v1.4'
     needs: integration-tests
     uses: ./.github/workflows/publish.yaml