Publish new provider version

Author: hamishfor

.github/workflows/release.yaml

@@ -55,4 +55,11 @@ jobs:
           SPACELIFT_API_KEY_ID: ${{ secrets.SPACELIFT_API_KEY_ID }}
           SPACELIFT_API_KEY_SECRET: ${{ secrets.SPACELIFT_API_KEY_SECRET }}
         run:
-          spacectl provider create-version --type=nexus
+          spacectl provider create-version --type=nexus
+      
+      - name: Publish provider
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          spacectl provider list-versions --type nexus -o json < versions.json
+          VERSION_ID=$(jq --arg version "${{ github.ref_name }}" '.versions[] | select(.number == $version) | .id' versions.json)
+          spacectl provider publish-version --type=nexus --version=$VERSION_ID