Increase number of notes per page for SAST script

What does this MR do and why?

In some MRs there are more than 20 comments before the first pipeline runs and the bot posts its own comment and this causes duplicates. See !129376 (merged) with both comments by CUSTOM_SAST_RULES_BOT_PAT. This MR increases the paging to 100 as a quick patch before a better long term fix.

Screenshots or screen recordings

N/A

How to set up and validate locally

N/A

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.