Update actions/checkout action to v4

Signed-off-by: Wiktor Kwapisiewicz <[email protected]>

Author: wiktor-k

.github/workflows/ci.yml

@@ -9,31 +9,31 @@ jobs:
     name: Check spelling
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Check spelling
         uses: codespell-project/actions-codespell@v1
 
   formatting:
     name: Check formatting
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Check formatting
         run: cargo fmt --all -- --check
 
   docs:
     name: Check documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Check documentation
         run: RUSTDOCFLAGS="-Dwarnings" cargo doc --document-private-items --no-deps
 
   build:
     name: Execute CI script
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
@@ -48,7 +48,7 @@ jobs:
     steps:
       - name: Install dependencies
         run: dnf -y install git cargo clang-devel kryoptic
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Test script
         env:
           KRYOPTIC_CONF: /tmp/kryoptic.sql
@@ -63,7 +63,7 @@ jobs:
     name: MSRV - Execute CI script
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust toolchain on MSRV
         uses: actions-rs/toolchain@v1
         with:
@@ -75,7 +75,7 @@ jobs:
     name: Check links
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Link Checker
       uses: peter-evans/link-checker@v1
       with:

.github/workflows/nightly.yml

@@ -16,7 +16,7 @@ jobs:
     name: Check for unused dependencies
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           ref: "${{ github.event.inputs.rev }}"
       - name: Install latest Rust
@@ -32,7 +32,7 @@ jobs:
     name: Execute builds with updated dependencies
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
@@ -73,7 +73,7 @@ jobs:
     name: Check for crates with security vulnerabilities
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           ref: "${{ github.event.inputs.rev }}"
       - name: Install latest Rust