fix(ci): use correct checkout version

Fat fingered by yours truly while adjusting other versions.

PR: #169

Author: jbergstroem

.github/workflows/test-bun.yml

@@ -13,7 +13,7 @@ jobs:
     name: Test
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
 
       - uses: oven-sh/setup-bun@v2
       - run: bun install
@@ -32,7 +32,7 @@ jobs:
     name: E2E Test
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
 
       - uses: oven-sh/setup-bun@v2
       - run: bun install