Bump actions/checkout from 5 to 6 (#151)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
     runs-on: macos-15
     steps:
       - name: git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: unit tests
         run: |
@@ -56,7 +56,7 @@ jobs:
     runs-on: macos-15
     steps:
       - name: git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: ui tests
         run: |

.github/workflows/spm-ios.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: macos-15
     steps:
       - name: git checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: xcode version
         run: xcodebuild -version -sdk