chore: update release workflow to use Zig 0.15.0

Author: ch4r10t33r

.github/workflows/auto-release.yml

@@ -250,7 +250,7 @@ jobs:
       - name: Setup Zig
         uses: goto-bus-stop/setup-zig@v2
         with:
-          version: 0.14.1
+          version: 0.15.0
 
       - name: Create cache directories (Unix)
         if: runner.os != 'Windows'