fix: update Bun version to 1.2.12 in GitHub Actions workflow

Author: jkyberneees

.github/workflows/tests.yaml

@@ -10,7 +10,7 @@ jobs:
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
         with:
-          bun-version: 1.2
+          bun-version: 1.2.12
 
       - name: Install dependencies
         run: bun install