chore: collect --dry-run and --yes opts info in feature request t…

…emplate (#838)

chore: collect --dry-run and --yes opts info in feature request template

.github/ISSUE_TEMPLATE/feature_request.md

@@ -8,10 +8,14 @@ assignees: ''
 ---
 
 ## I want to suggest a new step
-### Which tool is this about? Where is its repository?
-### Which operating systems are supported by this tool?
-### What should Topgrade do to figure out if the tool needs to be invoked?
-### Which exact commands should Topgrade run?
+
+* Which tool is this about? Where is its repository?
+* Which operating systems are supported by this tool?
+* What should Topgrade do to figure out if the tool needs to be invoked?
+* Which exact commands should Topgrade run?
+* Does it have a `--dry-run` option? i.e., print what should be done and exit
+* Does it need the user to confirm the execution? And does it provide a `--yes`
+  option to skip this step?
 
 ## I want to suggest some general feature
 Topgrade should...