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

.github/workflows/audit.yml

@@ -8,7 +8,7 @@ jobs:
   audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v4.1.5
       - uses: actions-rs/[email protected]
         with:
           token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/build.yaml

@@ -5,7 +5,7 @@ jobs:
   build:
     runs-on: "ubuntu-latest" 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install Protoc
         uses: arduino/setup-protoc@v1
       - uses: actions-rs/toolchain@v1

.github/workflows/deny.yaml

@@ -11,7 +11,7 @@ jobs:
           - advisories
           - bans licenses sources
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: EmbarkStudios/cargo-deny-action@v1
         with:
           command: check ${{ matrix.checks }}

.github/workflows/publish.yaml

@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: "ubuntu-latest" 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install Protoc
         uses: arduino/setup-protoc@v1
       - uses: actions-rs/toolchain@v1