fix(FontFamilyDropdown.tsx): use FontFamily type for event value

The event.target.value type was string, but it should be
FontFamily. This change ensures that the correct type is used.

packages/editor-toolbar/src/components/FontFamilyDropdown.tsx

@@ -2,7 +2,7 @@ import React from "react"
 import { Select, MenuItem } from "@material-ui/core"
 import { useLexicalComposerContext } from "@lexical/react/LexicalComposerContext"
 import { useAtom } from "jotai"
-import { fontFamilyAtom, fonts } from "../context/atomConfigs"
+import { fontFamilyAtom, fonts, FontFamily } from "../context/atomConfigs"
 import { applyTextStyles } from "../utils/textStyles"
 import { useToolbarItemStyles } from "../hooks/useToolbarItemStyles"
 
@@ -18,7 +18,7 @@ const FontFamilyDropdown = () => {
   const joinedClasses = `${classes.root} ${classes.spaced}`
 
   const onFontFamilySelect = (event: FontFamilySelectProperties) => {
-    applyTextStyles(editor, { "font-family": event.target.value as string })
+    applyTextStyles(editor, { "font-family": event.target.value as FontFamily })
   }
 
   return (