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](actions/checkout@v2...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install Rust ${{ matrix.toolchain }} toolchain
         uses: actions-rs/toolchain@v1
         with:
@@ -202,7 +202,7 @@ jobs:
       TOOLCHAIN: nightly
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
         uses: actions-rs/toolchain@v1
         with:
@@ -241,7 +241,7 @@ jobs:
       TOOLCHAIN: 1.52.1
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
@@ -266,7 +266,7 @@ jobs:
       TOOLCHAIN: stable
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install Rust 1.58 toolchain
         uses: actions-rs/toolchain@v1
         with:
@@ -290,7 +290,7 @@ jobs:
       TOOLCHAIN: 1.47.0
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install Rust ${{ env.TOOLCHAIN }} toolchain
         uses: actions-rs/toolchain@v1
         with: