Update README.md

Author: michaelhenry

README.md

@@ -39,7 +39,7 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v1
-      - run: xcodebuild test -project App.xcodeproj -scheme App -configuration Debug -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone X,OS=13.0' -enableCodeCoverage YES
+      - run: xcodebuild test -project App.xcodeproj -scheme App -configuration Debug -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone X,OS=13.0' -enableCodeCoverage YES -derivedDataPath DerivedData
       - uses: michaelhenry/[email protected]
         with:
           build-path: DerivedData
@@ -76,7 +76,7 @@ Otherwise, if your project is an ios/macos that uses the `xcodebuild test` to te
 Eg.
 
 ```yml
-  - run: xcodebuild test -project App.xcodeproj -scheme App -configuration Debug -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone X,OS=13.0' -enableCodeCoverage YES
+  - run: xcodebuild test -project App.xcodeproj -scheme App -configuration Debug -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone X,OS=13.0' -enableCodeCoverage YES -derivedDataPath DerivedData
   - uses: michaelhenry/[email protected]
     with:
       build-path: DerivedData