Update checkout action to v4

Author: bash

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ env.CARGO_TOOLCHAIN }}
@@ -29,7 +29,7 @@ jobs:
     env:
       RUSTDOCFLAGS: "-D warnings"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ env.CARGO_TOOLCHAIN }}
@@ -45,7 +45,7 @@ jobs:
     env:
       RUSTFLAGS: "-D warnings"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ env.CARGO_TOOLCHAIN }}

.github/workflows/release.yaml

@@ -31,7 +31,7 @@ jobs:
         id: tag
         uses: dawidd6/action-get-tag@v1
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Remove build script
         run: |
           rm build.rs
@@ -81,7 +81,7 @@ jobs:
         id: tag
         uses: dawidd6/action-get-tag@v1
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install rust toolchain
         uses: dtolnay/rust-toolchain@master
         with:
@@ -116,7 +116,7 @@ jobs:
         id: tag
         uses: dawidd6/action-get-tag@v1
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install rust toolchain
         uses: dtolnay/rust-toolchain@master
         with: