(maint) Update actions/setup-dotnet action to v2

Author: renovate-bot

.github/workflows/build.yml

@@ -44,17 +44,17 @@ jobs:
         uses: actions/checkout@v2
       - name: Fetch all tags and branches
         run: git fetch --prune --unshallow
-      - uses: actions/setup-dotnet@v1.9.1
+      - uses: actions/setup-dotnet@v2.0.0
         with:
           # codecov needs 2.1
           dotnet-version: '2.1.818'
-      - uses: actions/setup-dotnet@v1.9.1
+      - uses: actions/setup-dotnet@v2.0.0
         with:
           dotnet-version: '3.1.x'
-      - uses: actions/setup-dotnet@v1.9.1
+      - uses: actions/setup-dotnet@v2.0.0
         with:
           dotnet-version: '5.0.x'
-      - uses: actions/setup-dotnet@v1.9.1
+      - uses: actions/setup-dotnet@v2.0.0
         with:
           dotnet-version: '6.0.x'
       - name: Cache Tools

.github/workflows/codeql-analysis.yml

@@ -34,17 +34,17 @@ jobs:
       with:
         fetch-depth: 0
 
-    - uses: actions/setup-dotnet@v1.9.1
+    - uses: actions/setup-dotnet@v2.0.0
       with:
         # codecov needs 2.1
         dotnet-version: '2.1.818'
-    - uses: actions/setup-dotnet@v1.9.1
+    - uses: actions/setup-dotnet@v2.0.0
       with:
         dotnet-version: '3.1.x'
-    - uses: actions/setup-dotnet@v1.9.1
+    - uses: actions/setup-dotnet@v2.0.0
       with:
         dotnet-version: '5.0.x'
-    - uses: actions/setup-dotnet@v1.9.1
+    - uses: actions/setup-dotnet@v2.0.0
       with:
         dotnet-version: '6.0.x'