added docker login for release registry in github workflow (#9)

Author: kpiyush17

.github/workflows/spectro-release.yaml

@@ -37,6 +37,12 @@ jobs:
       - uses: actions/checkout@v3
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
+      - name: Login to private registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ secrets.REGISTRY_URL }}
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
       - name: Login to dev private registry
         uses: docker/login-action@v1
         with: