restore master workflow (#380)

Author: jaeopt

.github/workflows/csharp.yml

@@ -103,14 +103,14 @@ jobs:
   integration_tests:
     name: Run Integration Tests
     needs: [ netFrameworksAndUnitTest, netStandard16, netStandard20 ]
-    uses: optimizely/csharp-sdk/.github/workflows/integration_test.yml@jae/FSSDK-11077
+    uses: optimizely/csharp-sdk/.github/workflows/integration_test.yml@master
     secrets:
       CI_USER_TOKEN: ${{ secrets.CI_USER_TOKEN }}
 
   fullstack_production_suite:
     name: Run Performance Tests
     needs: [ netFrameworksAndUnitTest, netStandard16, netStandard20 ]
-    uses: optimizely/csharp-sdk/.github/workflows/integration_test.yml@jae/FSSDK-11077
+    uses: optimizely/csharp-sdk/.github/workflows/integration_test.yml@master
     with:
       FULLSTACK_TEST_REPO: ProdTesting
     secrets: