ci: prevent concurrent release workflows (#14717)

Author: soberm

.github/workflows/release-latest.yml

@@ -5,6 +5,11 @@ permissions:
   contents: write
   pull-requests: write
 
+# Prevent concurrent releases to avoid race conditions
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+
 on:
   push:
     branches: