fix(AIP-236): fix typo (#1066)

fix typo by applying s/life traffic/live traffic

Author: NoamRabbani

aip/general/0236.md

@@ -80,7 +80,7 @@ message PolicyExperiment {
   string name = 1;
  
   // The policy experiment. This Policy will be used to preview the effects of
-  // the change but will not affect life traffic.
+  // the change but will not affect live traffic.
   Policy policy = 2;
 
   // The metadata associated with this policy experiment.