Fix typo (facebook#20466)

Author: inokawa

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

@@ -1059,7 +1059,7 @@ function completeWork(
       }
 
       if (nextDidTimeout && !prevDidTimeout) {
-        // If this subtreee is running in blocking mode we can suspend,
+        // If this subtree is running in blocking mode we can suspend,
         // otherwise we won't suspend.
         // TODO: This will still suspend a synchronous tree if anything
         // in the concurrent tree already suspended during this render.

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

@@ -1059,7 +1059,7 @@ function completeWork(
       }
 
       if (nextDidTimeout && !prevDidTimeout) {
-        // If this subtreee is running in blocking mode we can suspend,
+        // If this subtree is running in blocking mode we can suspend,
         // otherwise we won't suspend.
         // TODO: This will still suspend a synchronous tree if anything
         // in the concurrent tree already suspended during this render.

packages/react/src/__tests__/ReactProfiler-test.internal.js

@@ -778,7 +778,7 @@ describe('Profiler', () => {
           },
         );
 
-        // Flush sync work with a nested upate
+        // Flush sync work with a nested update
         ReactNoop.flushSync(() => {
           ReactNoop.render(
             <React.Profiler id="root" onRender={onRender}>