Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: clarkd

.github/copilot-instructions.md

@@ -1,7 +1,7 @@
 When reviewing code, focus on:
 
 ## Versioning
-Any diff that touches files inside a plugin directory must include a corresponding change to metadata.json, that increases the `version` field. If no version bump is present, assume the task is unfinished and prompt to add one.
+Any diff that touches files inside a plugin directory must include a corresponding change to metadata.json that increases the `version` field. If no version bump is present, assume the task is unfinished and prompt to add one.
 
 ## Naming & language
 * Do not use “you” “Your”. Avoid conversational or instructional phrasing. Keep text neutral, concise, and descriptive.