Update to reflect branch renaming master->main

Signed-off-by: Yuri Shkuro <[email protected]>

.github/workflows/jaeger-dockerimage.yml

@@ -36,7 +36,7 @@ jobs:
         #   - other tags can be used as is
         # Documentation: https://github.com/docker/metadata-action#tags-input
         tags: |
-          type=raw,value=latest,enable=${{ github.ref == 'refs/heads/master' }}
+          type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
           type=semver,pattern={{version}}
           type=ref,event=tag
 
@@ -50,7 +50,7 @@ jobs:
     - name: Build and push Docker image
       uses: docker/build-push-action@v5
       with:
-        push: ${{ github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/') }}
+        push: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/') }}
         tags: ${{ steps.docker_meta.outputs.tags }}
         labels: ${{ steps.docker_meta.outputs.labels }}
         cache-from: type=gha