Fix sentence structure in "checks-availability" reusable (github#32280)

Co-authored-by: Alex Nguyen <[email protected]>

Author: 2 people

data/reusables/apps/checks-availability.md

@@ -1 +1 @@
-Write permission for the REST API to interact with checks is only available to {% data variables.product.prodname_github_apps %}. {% data variables.product.prodname_oauth_apps %} and authenticated users can view check runs and check suites, but they are not able to create them. If you aren't building a {% data variables.product.prodname_github_app %}, you might be interested in the using the REST API to interact with [commit statuses](/rest/commits#commit-statuses).
+Write permission for the REST API to interact with checks is only available to {% data variables.product.prodname_github_apps %}. {% data variables.product.prodname_oauth_apps %} and authenticated users can view check runs and check suites, but they are not able to create them. If you aren't building a {% data variables.product.prodname_github_app %}, you might be interested in using the REST API to interact with [commit statuses](/rest/commits#commit-statuses).