fix(ci): correct checkout SHA pin to actual v4 tag (11d5960)

The previous SHA 34e1148 was a v6-era PR commit, not the v4 tag.
GitHub Actions could not resolve it, causing zero-step CI failures.
The correct v4 tag SHA is 11d5960a326750d5838078e36cf38b85af677262.

Author: Coding-Dev-Tools

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
         python-version: ["3.11", "3.12", "3.13"]
 
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262
         with:
           persist-credentials: false
 
@@ -46,7 +46,7 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262
         with:
           persist-credentials: false