Excavator: Render Bulldozer Bot config file (#380)

Co-authored-by: svc-excavator-bot <svc-excavator-bot@palantir.com>

.bulldozer.yml

@@ -2,9 +2,9 @@
 
 version: 1
 merge:
-  whitelist:
+  trigger:
     labels: ["merge when ready"]
-  blacklist:
+  ignore:
     labels: ["do not merge"]
   method: squash
   options:
@@ -13,5 +13,5 @@ merge:
       message_delimiter: ==COMMIT_MSG==
   delete_after_merge: true
 update:
-  whitelist:
+  trigger:
     labels: ["update me"]