Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/audit.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: taiki-e/install-action@v2
         with:
           tool: cargo-audit

.github/workflows/format.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install Rust nightly
         run: |
           rustup toolchain install nightly --profile minimal --component rustfmt --allow-downgrade
@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: taiki-e/install-action@v2
         with:
           tool: taplo-cli

.github/workflows/lint.yml

@@ -57,7 +57,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.channel }} --profile minimal --component clippy --allow-downgrade

.github/workflows/publish.yml

@@ -20,6 +20,6 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Test Publish
         run: cargo publish --dry-run

.github/workflows/spellcheck.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: taiki-e/install-action@v2
         with:
           tool: cargo-spellcheck
@@ -36,7 +36,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: taiki-e/install-action@v2
         with:
           tool: typos-cli

.github/workflows/test.yml

@@ -54,7 +54,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.rust }} --profile minimal --allow-downgrade
@@ -118,7 +118,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.rust }} --target thumbv6m-none-eabi --profile minimal --allow-downgrade
@@ -150,7 +150,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install Rust
         run: |
           rustup toolchain install ${{ matrix.rust.version }} --profile minimal --allow-downgrade

.github/workflows/validate.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install Rust
         run: |
           rustup toolchain install nightly --profile minimal --component miri,rust-src --allow-downgrade