Bump actions/checkout from 4 to 5 (#70)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: macOS-13
     steps:
       - name: git checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: unit tests
         run: |

.github/workflows/pod-lint.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: macOS-13
     steps:
       - name: git checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: ruby versions
         run: |

.github/workflows/spm.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: macOS-13
     steps:
       - name: git checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: xcode version
         run: xcodebuild -version -sdk