ci: pin to zig 0.14.0

Author: vrischmann

.github/workflows/main.yml

@@ -38,7 +38,7 @@ jobs:
       - name: Setup zig
         uses: mlugg/setup-zig@v1
         with:
-          version: master
+          version: 0.14.0
 
       - name: Install qemu
         if: ${{ matrix.os == 'ubuntu-24.04' }}