[PLAT-2889] Client: Fix pypi publish workflow script (#12977)

GitOrigin-RevId: f12770316d53d8dc25577e6c1b6359786888584d

Author: Stephen C. Pope

scripts/version_suffix.py

@@ -5,7 +5,7 @@
 import sys
 
 file_path = sys.argv[1]
-suffix = sys.argv[2].strip()
+suffix = len(sys.argv) >= 3 and sys.argv[2].strip() or ""
 
 with open(file_path) as f:
     lines = f.readlines()