fix typos in comments

Author: salazarm

packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js

@@ -970,7 +970,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
     document.body.removeChild(container);
   });
 
-  describe('can handle replaying events as part of multiple instance of React', () => {
+  describe('can handle replaying events as part of multiple instances of React', () => {
     let resolveInner;
     let resolveOuter;
     let innerPromise;
@@ -1156,7 +1156,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
       });
 
       // Nothing happens to inner app yet.
-      // Its blocked on the outer app replaing the event
+      // Its blocked on the outer app replaying the event
       expect(InnerScheduler).toHaveYielded([]);
       // Outer hydrates and schedules Replay
       expect(OuterScheduler).toHaveYielded(['Outer']);

packages/react-dom/src/events/ReactDOMEventListener.js

@@ -221,7 +221,7 @@ function dispatchEventWithEnableCapturePhaseSelectiveHydrationWithoutDiscreteEve
     eventSystemFlags & IS_CAPTURE_PHASE &&
     isDiscreteEventThatRequiresHydration(domEventName)
   ) {
-    // Intentionally not strick equal. Could be `null` or `undefined`
+    // Intentionally not strict equal. Could be `null` or `undefined`
     while (blockedOn != null) {
       const fiber = getInstanceFromNode(blockedOn);
       if (fiber !== null) {