Bump actions/checkout from 2 to 3

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           target: ${{ matrix.target }}
           override: true
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Build
         env: 
           CARGO_BUILD_TARGET: ${{ matrix.target }}
@@ -70,7 +70,7 @@ jobs:
           target: ${{ matrix.target }}
           override: true
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install linker
         if: matrix.target == 'i686-unknown-linux-gnu'
         run: |
@@ -96,7 +96,7 @@ jobs:
           target: ${{ matrix.target }}
           override: true
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Check
         env:
           CARGO_BUILD_TARGET: ${{ matrix.target }}
@@ -111,6 +111,6 @@ jobs:
           toolchain: nightly
           override: true
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Test
         run: make test

.github/workflows/clippy.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable

.github/workflows/minver.yml

@@ -9,7 +9,7 @@ jobs:
     continue-on-error: true
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: nightly

.github/workflows/rustfmt.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable