Fixed PR link in push-docs Slack notification

[kristin-kronstain-brown]

Description

Fixed PR link in push-docs Slack notification.

API changes

Code changes

CI changes

Fixed PR link in push-docs Slack notification.

Docs changes

Context

Interesting decisions

Testing steps

Notes for reviewers

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[kristin-kronstain-brown]

/skip-changelog

[kristin-kronstain-brown]

/skip-ci

[github-actions]

Visit the preview URL for this PR (updated for commit 72b455d):

https://gloo-edge--pr11367-kkb-slack-pr-link-ihjp7ttt.web.app

_{(expires Fri, 14 Aug 2026 17:24:45 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: 77c2b86e287749579b7ff9cadb81e099042ef677}