ci: use official setup-nimble-action

Author: AI Assistant

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Nim
-        uses: jiro4989/setup-nim-action@v1
+        uses: nim-lang/setup-nimble-action@v1
         with:
           nim-version: '2.2.x'