chore(deps): update actions/checkout action to v4 (#118)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build.yml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - uses: Swatinem/rust-cache@v2
 
@@ -67,7 +67,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: install rust
         uses: actions-rs/toolchain@v1
@@ -87,7 +87,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: check denies
         uses: EmbarkStudios/cargo-deny-action@v2
@@ -104,7 +104,7 @@ jobs:
 
     steps:
       - name: checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0