Add conditional checks for FreeBSD diff file generation in release workflow (#5001)

.github/workflows/release.yml

@@ -32,7 +32,18 @@ jobs:
       - name: Generate FreeBSD port issue body
         run: bash release_files/freebsd-port-issue-body.sh
 
+      - name: Check if diff was generated
+        id: check_diff
+        run: |
+          if ls netbird-*.diff 1> /dev/null 2>&1; then
+            echo "diff_exists=true" >> $GITHUB_OUTPUT
+          else
+            echo "diff_exists=false" >> $GITHUB_OUTPUT
+            echo "No diff file generated (port may already be up to date)"
+          fi
+
       - name: Extract version
+        if: steps.check_diff.outputs.diff_exists == 'true'
         id: version
         run: |
           VERSION=$(ls netbird-*.diff | sed 's/netbird-\(.*\)\.diff/\1/')
@@ -41,6 +52,7 @@ jobs:
           cat netbird-*.diff
 
       - name: Test FreeBSD port
+        if: steps.check_diff.outputs.diff_exists == 'true'
         uses: vmactions/freebsd-vm@v1
         with:
           usesh: true
@@ -92,6 +104,7 @@ jobs:
             echo "FreeBSD port test completed successfully!"
 
       - name: Upload FreeBSD port files
+        if: steps.check_diff.outputs.diff_exists == 'true'
         uses: actions/upload-artifact@v4
         with:
           name: freebsd-port-files