chore(deps): update actions/checkout action to v6 (#76)

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

Author: renovate[bot]

.github/workflows/autofix.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: npm i -g --force corepack && corepack enable
       - uses: actions/setup-node@v6
         with:

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: npm i -g --force corepack && corepack enable
       - uses: actions/setup-node@v6
         with:
@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: npm i -g --force corepack && corepack enable
       - uses: actions/setup-node@v6
         with:
@@ -55,7 +55,7 @@ jobs:
       image: mcr.microsoft.com/playwright:v1.52.0-noble
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: npm i -g --force corepack && corepack enable
       - uses: actions/setup-node@v6
         with:

.github/workflows/provenance.yml

@@ -13,7 +13,7 @@ jobs:
   check-provenance:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Check provenance downgrades