ci(workflows): Update actions/checkout to v6

Author: arturcic

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
         os: [ windows-2025, ubuntu-24.04, macos-15 ]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/different-job.yml

@@ -20,7 +20,7 @@ jobs:
       GitVersion_SemVer: ${{ steps.version_step.outputs.GitVersion_SemVer }}
       GitVersion_FullSemVer: ${{ steps.version_step.outputs.GitVersion_FullSemVer }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/same-job.yml

@@ -10,7 +10,7 @@ jobs:
         os: [ windows-2025, ubuntu-24.04, macos-15 ]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0