Fix typo in comment (accumlated → accumulated) (#21637)

Co-authored-by: HuJiajie <hujj@firstgrid.cn>

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

@@ -557,7 +557,7 @@ function updateSimpleMemoComponent(
         // The pending lanes were cleared at the beginning of beginWork. We're
         // about to bail out, but there might be other lanes that weren't
         // included in the current render. Usually, the priority level of the
-        // remaining updates is accumlated during the evaluation of the
+        // remaining updates is accumulated during the evaluation of the
         // component (i.e. when processing the update queue). But since since
         // we're bailing out early *without* evaluating the component, we need
         // to account for it here, too. Reset to the value of the current fiber.

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

@@ -557,7 +557,7 @@ function updateSimpleMemoComponent(
         // The pending lanes were cleared at the beginning of beginWork. We're
         // about to bail out, but there might be other lanes that weren't
         // included in the current render. Usually, the priority level of the
-        // remaining updates is accumlated during the evaluation of the
+        // remaining updates is accumulated during the evaluation of the
         // component (i.e. when processing the update queue). But since since
         // we're bailing out early *without* evaluating the component, we need
         // to account for it here, too. Reset to the value of the current fiber.