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

Author: renovate[bot]

.github/workflows/actionlint.yml

@@ -15,7 +15,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Download actionlint
         id: get_actionlint
         run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)

.github/workflows/codecov.yml

@@ -12,7 +12,7 @@ jobs:
   codecov:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/cache@v4

.github/workflows/copyrights.yml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: yegor256/copyrights-action@0.0.12
         with:
           ignore: >-

.github/workflows/grammar-up.yml

@@ -17,7 +17,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: |-
           latest=$(curl --silent -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/objectionary/eo/releases/latest | jq -r '.tag_name')
           sed -E -i "s/VERSION := [0-9\.]+/VERSION := ${latest}/" Makefile

.github/workflows/make.yml

@@ -20,7 +20,7 @@ jobs:
         node-version: [22.x]
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/cache@v4

.github/workflows/markdown-lint.yml

@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: DavidAnson/markdownlint-cli2-action@v21.0.0

.github/workflows/pdd.yml

@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: volodya-lombrozo/pdd-action@master

.github/workflows/reuse.yml

@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: fsfe/reuse-action@v6

.github/workflows/typos.yml

@@ -15,5 +15,5 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: crate-ci/typos@v1.39.2

.github/workflows/up.yml

@@ -17,7 +17,7 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: |-
           git fetch --tags --force && \
           latest=$(git tag --sort=creatordate | tail -1) && \