docs: fixed links

Author: ethanneff

CONTRIBUTING.md

@@ -12,11 +12,11 @@
 
 ## Data Flow
 
-- Users sets values https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/blob/master/testbed/config.template.xml#L6-L13
-- Hooks run on build https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/blob/master/plugin.xml#L45-L47
-- Hooks call scripts https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/tree/master/src/scripts/hooks
-- Scripts for iOS https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/tree/master/src/scripts/ios
-- Scripts for Android https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/tree/master/src/scripts/android
+- [Users sets values](https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/blob/master/testbed/config.template.xml#L6-L13)
+- [Hooks run on build](https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/blob/master/plugin.xml#L45-L47)
+- [Hooks call scripts[(https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/tree/master/src/scripts/hooks)
+- [Scripts for iOS](https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/tree/master/src/scripts/ios)
+- [Scripts for Android](https://github.com/BranchMetrics/cordova-ionic-phonegap-branch-deep-linking/tree/master/src/scripts/android)
 
 
 ## Dependencies