chore: fix non-scrollable scrollbar bug in chat composer and chat log docs example (#3543)

Author: nkrantz

.changeset/fifty-peas-swim.md

@@ -0,0 +1,6 @@
+---
+"@twilio-paste/chat-composer": patch
+"@twilio-paste/core": patch
+---
+
+[Chat Composer] Change overflowY from "scroll" to "auto" to prevent non-scrollable scrollbar bug

packages/paste-core/components/chat-composer/src/ChatComposer.tsx

@@ -116,7 +116,7 @@ export const ChatComposer = React.forwardRef<HTMLDivElement, ChatComposerProps>(
         paddingX="space40"
         borderRadius="borderRadius20"
         _focusWithin={{ boxShadow: "shadowFocus" }}
-        overflowY="scroll"
+        overflowY="auto"
         maxHeight={maxHeight}
         disabled={disabled}
         aria-disabled={disabled}

packages/paste-website/src/component-examples/ChatComposerExamples.tsx

@@ -213,7 +213,7 @@ export const ChatDialogExample = `const ChatDialog = () => {
 
   return (
     <Box>
-      <Box ref={scrollerRef} overflowX="hidden" overflowY="scroll" maxHeight="size50" tabIndex={0}>
+      <Box ref={scrollerRef} overflowX="hidden" overflowY="auto" maxHeight="size50" tabIndex={0}>
         <ChatLogger ref={loggerRef} chats={chats} />
       </Box>
       <Box