Update bot-assignment-check workflow to use self hosted runner (#1931)

Signed-off-by: Rayan Kamdem <rayankdm@umich.edu>

Author: rayank906

.github/workflows/bot-assignment-check.yml

@@ -9,7 +9,7 @@ permissions:
 
 jobs:
   check-assignment-limit:
-    runs-on: ubuntu-latest
+    runs-on: hl-sdk-py-lin-md
     steps:
       - name: Harden the runner
         uses: step-security/harden-runner@58077d3c7e43986b6b15fba718e8ea69e387dfcc # v2.15.1

CHANGELOG.md

@@ -19,6 +19,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 ### .github
 - archived workflows relating to PR reminders
+- chore: switch workflow runner from ubuntu-latest to hl-sdk-py-lin-md for bot-assignment-check.yml workflow
 - chore: update concurrency group for GFI assignment workflow to prevent race conditions (`#1910`)
 - chore: switch workflow runner from ubuntu-latest to hl-sdk-py-lin-md for bot-beginner-assign-on-comment workflow