build(deps): 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/ci.yml

@@ -33,7 +33,7 @@ jobs:
           - mcu: "stm32wle5"
             target: "thumbv6m-none-eabi"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: ${{ matrix.toolchain }}
@@ -74,7 +74,7 @@ jobs:
       # RUSTFLAGS: "-D warnings"
       DEFMT_LOG: "debug"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: stable
@@ -106,7 +106,7 @@ jobs:
     needs:
       - build_testsuite
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Display probe-run version
         run: probe-run --version
       - name: List probes
@@ -133,7 +133,7 @@ jobs:
           - "stm32wl5x_cm4"
           - "stm32wle5"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: stable
@@ -154,7 +154,7 @@ jobs:
     name: Clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: stable
@@ -168,7 +168,7 @@ jobs:
     runs-on: ubuntu-latest
     env: {"RUSTFLAGS": "-D warnings"}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: nightly
@@ -180,7 +180,7 @@ jobs:
     runs-on: ubuntu-latest
     env: {"RUSTDOCFLAGS": "-D warnings"}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: stable
@@ -194,7 +194,7 @@ jobs:
     runs-on: ubuntu-latest
     env: {"RUSTDOCFLAGS": "-D warnings --cfg docsrs"}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: nightly
@@ -225,7 +225,7 @@ jobs:
       - test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions-rs/[email protected]
         with:
           toolchain: stable