[FSSDK-11731] developer pack version fix

Author: junaed-optimizely

.github/workflows/csharp.yml

@@ -46,8 +46,8 @@ jobs:
         uses: NuGet/setup-nuget@v1
       - name: Install .NET Framework Developer Packs
         run: |
-          choco install netfx-4.5-devpack -y
-          choco install netfx-4.0-devpack -y
+          choco install netfx-4.5.2-devpack -y
+          choco install netfx-4.0.3-devpack -y
       - name: Restore NuGet packages
         run: nuget restore ./OptimizelySDK.NETFramework.sln
       - name: Build & strongly name assemblies