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

Author: renovate[bot]

.github/workflows/dotnet-coverage.yml

@@ -27,7 +27,7 @@ jobs:
     - name: Configure MongoDB (Ubuntu)
       run: sudo systemctl start mongod
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 # If you want to specify a particular version, use this. Otherwise, will use the Runner's installed version
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1

.github/workflows/dotnet-multi-os-test.yml

@@ -27,7 +27,7 @@ jobs:
     - name: Setup MongoDB
       uses: ankane/setup-mongodb@v1
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Setup dotnet
       uses: actions/setup-dotnet@v3
       with:

.github/workflows/dotnet-publish.yml

@@ -31,7 +31,7 @@ jobs:
     - name: Configure MongoDB (Ubuntu)
       run: sudo systemctl start mongod
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 # If you want to specify a particular version, use this. Otherwise, will use the Runner's installed version
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1