Update the Claude command to generate release notes with some allowed tools that it needs. (opensearch-project#6918)

Signed-off-by: David Venable <dlv@amazon.com>

Author: dlvenable

.claude/commands/generate-release-notes.md

@@ -1,3 +1,13 @@
+---
+description: Generate release notes for Data Prepper version $ARGUMENTS.
+allowed-tools:
+  - Bash(gh issue list *)
+  - Bash(gh pr list *)
+  - Read(release/script/release-notes/**)
+  - Read(release/release-notes/**)
+  - Write(release/release-notes/**)
+---
+
 Generate release notes for Data Prepper version $ARGUMENTS.
 
 ## Overview