Change date on release note for RBAC for Indexes

[jpipkin1]

Purpose of this pull request

This pull request changes a date in this release note: https://help.sumologic.com/release-notes-service/2024/10/14/manage/

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

Request in the #rbac-for-indexes Slack channel.