[community] Add new release version to issue template (#7021)

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -97,6 +97,7 @@ body:
       description: Which version of Apache DolphinScheduler are you running?
       options:
         - dev
+        - 2.0.0
         - 2.0.0-alpha
         - 1.3.9
         - 1.3.8