Add enableFacebookLinkCheck to branch-json.md in maintenance-3.x branch.

Author: jdee

docs/branch.json.md

@@ -97,9 +97,10 @@ version 3.x of react-native-branch, using [RNBranchModule.getAutoInstance()](htt
 |key|description|type|
 |---|---|---|
 |branchKey|The Branch key to use. Overrides liveKey, testKey and useTestInstance.|String|
-|liveKey|The live Branch key to use if useTestInstance is false. Ignored if useTestInstance is true or branchKey is present.|String|
 |debugMode|If true, `setDebug` will be called in the native SDK, enabling testing of install events.|Boolean|
 |delayInitToCheckForSearchAds|If true, `delayInitToCheckForSearchAds` will be called on the iOS Branch instance. Ignored on Android.|Boolean|
+|enableFacebookLinkCheck|If true, results in calling `enableFacebookAppLinkCheck()` in the Branch Android SDK and `registerFacebookDeepLinkingClass:` in the Branch iOS SDK.|Boolean|
+|liveKey|The live Branch key to use if useTestInstance is false. Ignored if useTestInstance is true or branchKey is present.|String|
 |testKey|The test Branch key to use if useTestInstance is true. Ignored if useTestInstance is false or branchKey is present.|String|
 |useTestInstance|Determines whether liveKey or testKey is used if branchKey is not present.|Boolean|