Update template to include lifecycle policy link (#156)

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -12,6 +12,8 @@ body:
         
         You can also ask for help in our [community Slack channel](https://join.slack.com/t/portainer/shared_invite/zt-txh3ljab-52QHTyjCqbe5RibC2lcjKA).
 
+        Please note that we only provide support for current versions of Portainer. You can find a list of supported versions in our [lifecycle policy](https://docs.portainer.io/start/lifecycle).
+        
         **DO NOT FILE ISSUES FOR GENERAL SUPPORT QUESTIONS**.
 
   - type: checkboxes
@@ -90,7 +92,7 @@ body:
   - type: dropdown
     attributes:
       label: Portainer version
-      description: We only provide support for the most recent version of Portainer and the previous 3 versions. If you are on an older version of Portainer we recommend [upgrading first](https://docs.portainer.io/start/upgrade) in case your bug has already been fixed.
+      description: We only provide support for current versions of Portainer as per the lifecycle policy linked above. If you are on an older version of Portainer we recommend [upgrading first](https://docs.portainer.io/start/upgrade) in case your bug has already been fixed.
       multiple: false
       options:
         - '2.24.0'
@@ -117,9 +119,6 @@ body:
         - '2.18.1'
         - '2.17.1'
         - '2.17.0'
-        - '2.16.2'
-        - '2.16.1'
-        - '2.16.0'
     validations:
       required: true