Ios integration tests (#11703)

_Description of what this PR is changing or adding, and why:_

In #11680, @deleSerna noticed a
bug crept into the refactored document. This should be fixed now.

_Issues fixed by this PR (if any):_

_PRs or commits this PR depends on (if any):_

## Presubmit checklist

- [ ] This PR is marked as draft with an explanation if not meant to
land until a future stable release.
- [ ] This PR doesn’t contain automatically generated corrections
(Grammarly or similar).
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Author: antfitch

src/content/testing/integration-tests/index.md

@@ -545,7 +545,7 @@ Complete the following steps to upload an Android APK.
       list. Encode all parameters as `base64`.
 
       ```console
-      $ ./gradlew project:task --defines="{base64 (key=value)}[, ...]"
+      $ ./gradlew project:task -Pdart-defines="{base64 (key=value)}[, ...]"
       ```
 
       * `(key=value)}[, ...]`: Replace this with a comma-separated list of