Fix build for new images

Author: JimBobSquarePants

.github/workflows/build-and-test.yml

@@ -53,11 +53,6 @@ jobs:
                   git fetch --prune --unshallow
                   git submodule -q update --init --recursive
 
-            - name: Setup DotNet SDK
-              uses: actions/setup-dotnet@v1
-              with:
-                  dotnet-version: "3.1.x"
-
             - name: Build
               shell: pwsh
               run: ./ci-build.ps1 "${{matrix.options.framework}}"
@@ -70,7 +65,7 @@ jobs:
                   XUNIT_PATH: .\tests\ImageSharp.Drawing.Tests # Required for xunit
 
             - name: Update Codecov
-              uses: codecov/codecov-action@v1.0.7
+              uses: codecov/codecov-action@v1
               if: matrix.options.codecov == true && startsWith(github.repository, 'SixLabors')
               with:
                   flags: unittests
@@ -96,11 +91,6 @@ jobs:
                   git fetch --prune --unshallow
                   git submodule -q update --init --recursive
 
-            - name: Setup DotNet SDK
-              uses: actions/setup-dotnet@v1
-              with:
-                  dotnet-version: "3.1.x"
-
             - name: Pack
               shell: pwsh
               run: ./ci-pack.ps1