Use biome 1.9.4 for now in CI too

Author: JelteF

.github/workflows/ci.yaml

@@ -21,7 +21,7 @@ jobs:
           args: "format --check"
 
       - name: Setup Biome
-        uses: biomejs/setup-biome@v2
+        uses: biomejs/setup-biome@v1.9.4
         with:
           version: latest