Fixing logic bug in githubactions

.github/workflows/dotnetcore.yml

@@ -38,7 +38,7 @@ jobs:
       working-directory: ../map-project/Lora-Map/Lora-Map/dpkg
 
     - name: Create release
-      if: success()
+      if: ${{ success() && github.event.ref == 'refs/heads/master' }}
       id: nightly_release
       uses: actions/create-release@v1
       env:
@@ -51,7 +51,7 @@ jobs:
         prerelease: true
         
     - name: Upload release asset amd64
-      if: success()
+      if: ${{ success() && github.event.ref == 'refs/heads/master' }}
       id: upload-release-asset-amd64
       uses: actions/upload-release-asset@v1.0.1
       env:
@@ -63,7 +63,7 @@ jobs:
         asset_content_type: application/x-deb
         
     - name: Upload release asset armhf
-      if: success()
+      if: ${{ success() && github.event.ref == 'refs/heads/master' }}
       id: upload-release-asset-armhf
       uses: actions/upload-release-asset@v1.0.1
       env: