Bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v3)

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

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

.github/workflows/checks.yml

@@ -13,7 +13,7 @@ jobs:
     name: "Check & Clippy"
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Cache cargo registry
         uses: actions/cache@v2
@@ -51,7 +51,7 @@ jobs:
     name: "Documentation"
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     name: "Formatting"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: actions-rs/toolchain@v1
         with:

.github/workflows/publish-docs.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1

.github/workflows/rust-tests.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
 
       - name: Cache cargo registry
         uses: actions/cache@v2

.github/workflows/security.yml

@@ -14,7 +14,7 @@ jobs:
     permissions: write-all
     name: "Audit Rust Dependencies"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: rustsec/audit-check@master
         with:
           token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/tests.yaml

@@ -8,7 +8,7 @@ jobs:
     name: tests (Mac OS X latest)
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Cache cargo registry
         uses: actions/cache@v2
@@ -73,7 +73,7 @@ jobs:
     runs-on: ${{ matrix.runner }}
     continue-on-error: ${{ matrix.continue-on-error == true }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Build ${{ matrix.name }}
         env: