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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
           - "1.21"
     steps:
       - name: Check out source code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
       - name: Set up Go
         uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5

.github/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
           - "1.21"
     steps:
       - name: Check out source code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
       - name: Set up Go
         uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5

.github/workflows/tidy.yml

@@ -13,7 +13,7 @@ jobs:
           - "1.21"
     steps:
       - name: Check out source code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
       - name: Set up Go
         uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5