Update actions/checkout digest to 064fe7f (#137)

Author: renovate[bot]

.github/workflows/CI.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: macOS-26
 
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
+      - uses: actions/checkout@064fe7f3312418007dea2b49a19844a9ee378f49
 
       - name: Read Xcode version
         id: xcode_version