save ruby file

Author: kay-kim

data/ruby-driver-published-branches.yaml

@@ -1,6 +1,6 @@
 version:
   published:
-    - '2.7'
+    - 'master'
     - '2.6'
     - '2.5'
     - '2.4'
@@ -9,15 +9,15 @@ version:
     - '2.0'
     - '1.x'
   active:
-    - '2.7'
+    - 'master'
     - '2.6'
     - '2.5'
     - '2.4'
     - '2.3'
     - '2.2'
     - '2.0'
   stable: '2.6'
-  upcoming: 2.7
+  upcoming: master
 git:
   branches:
     manual: 'master'