chore(deps): update actions/checkout action to v6 (#22)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/overflow-test.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Overflow Test
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false
 

.github/workflows/test.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Smoke Test
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false
 

.github/workflows/unit-test.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Unit test
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false