ci: pin checkout through verified Gitea mirror

.gitea/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: https://gitea.twinpay.one/yilsem/ci-actions-checkout@11d5960a326750d5838078e36cf38b85af677262 # upstream v4.4.0
         with:
           github-server-url: https://gitea.twinpay.one
       - name: Mobil TLS, profil ve baslatma regresyonlari
@@ -57,7 +57,7 @@ jobs:
     timeout-minutes: 40
     steps:
       - name: Kaynagi al
-        uses: actions/checkout@v4
+        uses: https://gitea.twinpay.one/yilsem/ci-actions-checkout@11d5960a326750d5838078e36cf38b85af677262 # upstream v4.4.0
         with:
           github-server-url: https://gitea.twinpay.one