ci: Update checkout action to latest version

Author: nicholasbishop

.github/workflows/rust.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Install qemu and OVMF
       run: |
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Install qemu and OVMF
       run: |
@@ -56,7 +56,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Install qemu and OVMF
       run: |
@@ -75,7 +75,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Run cargo test (without unstable)
         run: cargo xtask test
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Run cargo fmt
         run: |
@@ -113,7 +113,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Run miri
         run: |
@@ -132,7 +132,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Build
       run: cargo xtask test-latest-release
@@ -142,7 +142,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Build
         run: cargo xtask build
@@ -157,7 +157,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout sources
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Set toolchain
       run: cp .github/workflows/msrv_toolchain.toml rust-toolchain.toml