Bump actions/checkout from 2 to 3 (#742)

Author: dependabot[bot]

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v2
         with:

.github/workflows/codeql-analysis.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
     - name: Checkout source
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Setup .NET Core SDK
       uses: actions/setup-dotnet@v2

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Check github.ref starts with 'refs/tags/'
         if: ${{ !startsWith(github.ref, 'refs/tags/') }}
         run: |

.github/workflows/test.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup .NET Core SDK
         uses: actions/setup-dotnet@v2
         with: