Fix wrong context argument to apply

The context argument should be the array, not null.

I wrote a test that I'll include in the next PR.

Author: acdlite

packages/react-reconciler/src/ReactFiberWorkLoop.new.js

@@ -925,7 +925,7 @@ export function queueRecoverableErrors(errors: Array<mixed>) {
     workInProgressRootRecoverableErrors = errors;
   } else {
     workInProgressRootConcurrentErrors = workInProgressRootConcurrentErrors.push.apply(
-      null,
+      workInProgressRootConcurrentErrors,
       errors,
     );
   }

packages/react-reconciler/src/ReactFiberWorkLoop.old.js

@@ -925,7 +925,7 @@ export function queueRecoverableErrors(errors: Array<mixed>) {
     workInProgressRootRecoverableErrors = errors;
   } else {
     workInProgressRootConcurrentErrors = workInProgressRootConcurrentErrors.push.apply(
-      null,
+      workInProgressRootConcurrentErrors,
       errors,
     );
   }