deps: upgrade ujson

Author: snarfed

requirements.txt

@@ -101,7 +101,7 @@ tlslite-ng==0.8.2
 tweepy==4.16.0
 typing_extensions==4.15.0
 typing-validation==1.2.12
-ujson==5.11.0
+ujson==5.12.1
 update-checker==0.18.0
 urllib3==2.6.3
 webencodings==0.5.1