Fix versions in spec titles to match the description below

Change-Id: I1c3ddadd292aedb83495fee1f90caf331c7241d7
Reviewed-on: https://dart-review.googlesource.com/c/81271
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
diff --git a/runtime/vm/service/service.md b/runtime/vm/service/service.md
index b65f60f..d563a2c 100644
--- a/runtime/vm/service/service.md
+++ b/runtime/vm/service/service.md
@@ -1,4 +1,4 @@
-# Dart VM Service Protocol 3.9
+# Dart VM Service Protocol 3.11
 
 > Please post feedback to the [observatory-discuss group][discuss-list]
 
diff --git a/runtime/vm/service/service_dev.md b/runtime/vm/service/service_dev.md
index 39d695a..3d26758 100644
--- a/runtime/vm/service/service_dev.md
+++ b/runtime/vm/service/service_dev.md
@@ -1,4 +1,4 @@
-# Dart VM Service Protocol 3.10-dev
+# Dart VM Service Protocol 3.12-dev
 
 > Please post feedback to the [observatory-discuss group][discuss-list]