Reduce open PR limit for code review workflow (#16491)

Author: trask

.github/scripts/build-review-matrix.py

@@ -22,7 +22,7 @@
 SETTINGS_FILE = "settings.gradle.kts"
 PROGRESS_DIR = Path("/tmp/review-progress")
 PROGRESS_FILE = PROGRESS_DIR / "reviewed.txt"
-MAX_PRS = 15
+MAX_PRS = 10
 BATCH_SIZE = 10