chore(deps): update actions/checkout action to v4

.github/workflows/clippy-fmt.yml

@@ -11,7 +11,7 @@ jobs:
   fmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: ⚡ Cache
         uses: actions/cache@v2
         with:
@@ -21,7 +21,7 @@ jobs:
             target
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install Rust
         uses: actions-rs/toolchain@v1
@@ -37,7 +37,7 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: ⚡ Cache
         uses: actions/cache@v2
         with:
@@ -47,7 +47,7 @@ jobs:
             target
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install Rust
         uses: actions-rs/toolchain@v1

.github/workflows/coverage.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: ⚡ Cache
         uses: actions/cache@v2
         with:

.github/workflows/linux.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: ⚡ Cache
         uses: actions/cache@v2
         with: