build(deps): bump actions/checkout from 3 to 4 (#367)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
           - mcu: "stm32wle5"
             target: "thumbv6m-none-eabi"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.toolchain }}
@@ -74,7 +74,7 @@ jobs:
       # RUSTFLAGS: "-D warnings"
       DEFMT_LOG: "debug"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           target: thumbv7em-none-eabi
@@ -105,7 +105,7 @@ jobs:
     needs:
       - build_testsuite
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Display probe-run version
         run: probe-run --version
       - name: List probes
@@ -132,7 +132,7 @@ jobs:
           - "stm32wl5x_cm4"
           - "stm32wle5"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
 
       - name: Test HAL
@@ -151,7 +151,7 @@ jobs:
     name: Clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
@@ -164,7 +164,7 @@ jobs:
     runs-on: ubuntu-latest
     env: {"RUSTFLAGS": "-D warnings"}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@nightly
         with:
           components: rustfmt
@@ -175,7 +175,7 @@ jobs:
     runs-on: ubuntu-latest
     env: {"RUSTDOCFLAGS": "-D warnings"}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       # not run in parallel to avoid hitting concurrency limit
       # stm32wl5x_cm4 covered by rustdoc
@@ -189,7 +189,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@nightly
       - name: rustdoc
         run: |
@@ -232,7 +232,7 @@ jobs:
       - test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - name: Release stm32wlxx-hal
         run: |