updated issue template for v0.9.0

Author: =

.github/ISSUE_TEMPLATE/issue.yml

@@ -18,12 +18,8 @@ body:
       description: What version of dbus-mqtt-devices are you running?
       options:
         - 0.9.0 (latest)
+        - 0.9.0-rcN (release candidate)
         - 0.8.0 
-        - 0.6.6 
-        - 0.6.5 
-        - 0.6.4 
-        - 0.6.3 
-        - 0.7.5 (beta/experimental)
         - Other
     validations:
       required: true