Update to actions/checkout@v4 from v3.

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     name: Check MSRV and minimal-versions
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install tools
         uses: taiki-e/install-action@v2
@@ -43,21 +43,21 @@ jobs:
     name: Check format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: cargo fmt --check --all
 
   clippy:
     name: Check clippy
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: cargo clippy --all-targets --workspace --all-features -- -D warnings
 
   doc_tests:
     name: Run doc tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: cargo test --doc --workspace --features mint,glam
 
   docs:
@@ -66,7 +66,7 @@ jobs:
     env:
       RUSTDOCFLAGS: --cfg docs
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install nightly toolchain
         run: rustup toolchain install $NIGHTLY --no-self-update --profile=minimal
@@ -77,7 +77,7 @@ jobs:
     name: Run tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install tools
         uses: taiki-e/install-action@v2