chore: fix typo in EntityPage

Signed-off-by: Himanshu Mishra <himanshu@orkohunter.net>

.changeset/fluffy-cats-approve.md

@@ -0,0 +1,5 @@
+---
+'@backstage/create-app': patch
+---
+
+fix typo in the comments of EntityPage component

packages/create-app/templates/default-app/packages/app/src/components/catalog/EntityPage.tsx

@@ -160,7 +160,7 @@ const websiteEntityPage = (
 /**
  * NOTE: This page is designed to work on small screens such as mobile devices.
  * This is based on Material UI Grid. If breakpoints are used, each grid item must set the `xs` prop to a column size or to `true`,
- * since this does not default. If no breakpoints are used, the items will equitably share the asvailable space.
+ * since this does not default. If no breakpoints are used, the items will equitably share the available space.
  * https://material-ui.com/components/grid/#basic-grid.
  */