facebookincubator links : update some outdated links and fix two other broken links where they are actually the latest updated ones

Author: sktguha

fixtures/attribute-behavior/README.md

@@ -26,6 +26,6 @@ Right now, we use a purple outline to call out cases where the assigned property
 ---
 
 
-This project was bootstrapped with [Create React App](https://github.com/facebookincubator/create-react-app).
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
 
-You can find the guide for how to do things in a CRA [here](https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md).
+You can find the guide for how to do things in a CRA [here](https://github.com/facebook/create-react-app/blob/master/packages/cra-template/template/README.md).

packages/react-debug-tools/src/__tests__/ReactDevToolsHooksIntegration-test.js

@@ -133,7 +133,7 @@ describe('React hooks DevTools integration', () => {
   });
 
   // This test case is based on an open source bug report:
-  // facebookincubator/redux-react-hook/issues/34#issuecomment-466693787
+  // https://github.com/facebookincubator/redux-react-hook/issues/34#issuecomment-466693787
   it('should handle interleaved stateful hooks (e.g. useState) and non-stateful hooks (e.g. useContext)', () => {
     const MyContext = React.createContext(1);
 

packages/react-debug-tools/src/__tests__/ReactHooksInspectionIntegration-test.js

@@ -797,7 +797,7 @@ describe('ReactHooksInspectionIntegration', () => {
   });
 
   // This test case is based on an open source bug report:
-  // facebookincubator/redux-react-hook/issues/34#issuecomment-466693787
+  // https://github.com/facebookincubator/redux-react-hook/issues/34#issuecomment-466693787
   it('should properly advance the current hook for useContext', () => {
     const MyContext = React.createContext(1);
 

packages/shared/invokeGuardedCallbackImpl.js

@@ -81,7 +81,7 @@ if (__DEV__) {
     ) {
       // If document doesn't exist we know for sure we will crash in this method
       // when we call document.createEvent(). However this can cause confusing
-      // errors: https://github.com/facebookincubator/create-react-app/issues/3482
+      // errors: https://github.com/facebook/create-react-app/issues/3482
       // So we preemptively throw with a better message instead.
       invariant(
         typeof document !== 'undefined',