Wrap runners in quotes

Author: roryabraham

.github/workflows/remote-build-android.yml

@@ -9,7 +9,7 @@ concurrency:
 
 jobs:
   build:
-    runs-on: ${{ github.repository_owner == 'Expensify' && ubuntu-latest-xl || ubuntu-latest }}
+    runs-on: ${{ github.repository_owner == 'Expensify' && 'ubuntu-latest-xl' || 'ubuntu-latest' }}
     strategy:
       fail-fast: false
       matrix:

.github/workflows/remote-build-ios.yml

@@ -11,7 +11,7 @@ concurrency:
 
 jobs:
   build:
-    runs-on: ${{ github.repository_owner == 'Expensify' && macos-15-xlarge || macos-15 }}
+    runs-on: ${{ github.repository_owner == 'Expensify' && 'macos-15-xlarge' || 'macos-15' }}
     strategy:
       fail-fast: false
       matrix: