fix(gatsby): remove jsx from comment (#36855)

remove jsx from comment

packages/gatsby/src/utils/babel/babel-plugin-add-slice-placeholder-location.ts

@@ -4,7 +4,7 @@ import { ObjectProperty } from "@babel/types"
 import { store } from "../../redux"
 
 /**
- * This is a plugin that finds <Slice> placeholder components and injects the __renderedByLocation prop
+ * This is a plugin that finds Slice placeholder components and injects the __renderedByLocation prop
  * with filename and location in the file where the placeholder was found. This is later used to provide
  * more useful error messages when the user props are invalid showing codeframe where user tries to render it
  * instead of codeframe of the Slice component itself (internals of gatsby) that is not useful for the user.