test: swap runners to ubuntu-latest for e2e proof on fork

Temporary commit — NOT for merge. Swaps hl-sdk-py-lin-md → ubuntu-latest
in moderate-new-issues, approved-issues, and bot-coderabbit-plan-trigger
so the full lock→approve→unlock→CodeRabbit flow can be verified on a fork.

Signed-off-by: Anshul Kushwaha <137977998+sudo-anshul@users.noreply.github.com>

Author: sudo-anshul

.github/workflows/approved-issues.yml

@@ -23,7 +23,7 @@ jobs:
   approve:
     if: github.event.label.name == 'approved'
     name: Approve Issue
-    runs-on: hl-sdk-py-lin-md
+    runs-on: ubuntu-latest
 
     steps:
       - name: Harden Runner

.github/workflows/bot-coderabbit-plan-trigger.yml

@@ -12,7 +12,7 @@ permissions:
 
 jobs:
   coderabbit_plan_trigger:
-    runs-on: hl-sdk-py-lin-md
+    runs-on: ubuntu-latest
     concurrency:
       group: coderabbit-plan-${{ github.event.issue.number }}
       cancel-in-progress: false

.github/workflows/moderate-new-issues.yml

@@ -21,7 +21,7 @@ concurrency:
 jobs:
   moderate:
     name: Moderate Issue
-    runs-on: hl-sdk-py-lin-md
+    runs-on: ubuntu-latest
 
     steps:
       - name: Harden Runner