Bump actions/checkout from 3 to 4

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]>

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Rust
       # --no-self-update is necessary because the windows environment cannot self-update rustup.exe.
       run: rustup update stable --no-self-update && rustup default stable
@@ -56,7 +56,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Rust
       # --no-self-update is necessary because the windows environment cannot self-update rustup.exe.
       run: rustup update stable --no-self-update && rustup default stable
@@ -87,7 +87,7 @@ jobs:
           - wasm32-wasi
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo build and registry
         uses: actions/cache@v3
         with:
@@ -127,7 +127,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Cache cargo build and registry
       uses: actions/cache@v3
       with:
@@ -161,7 +161,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Cache cargo build and registry
       uses: actions/cache@v3
       with:
@@ -195,7 +195,7 @@ jobs:
           # - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo build and registry
         uses: actions/cache@v3
         with:
@@ -229,7 +229,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo build and registry
         uses: actions/cache@v3
         with:
@@ -259,7 +259,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo build and registry
         uses: actions/cache@v3
         with:
@@ -289,7 +289,7 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo build and registry
         uses: actions/cache@v3
         with:
@@ -310,7 +310,7 @@ jobs:
     name: valgrind
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Cache cargo build and registry
         uses: actions/cache@v3
         with:
@@ -353,7 +353,7 @@ jobs:
       - sanitizer
       - loom
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install latest nightly
         uses: actions-rs/toolchain@v1
         with:

.github/workflows/loc.yml

@@ -25,7 +25,7 @@ jobs:
   loc:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install Rust
         run: |