add missing bullet marker

Author: viglia

docs/concepts/data-management/event-grouping/stack-trace-rules.mdx

@@ -12,14 +12,14 @@ A subset of stack trace rules, when defined, will also be applied to incoming pr
 More specifically, only the rules with any of these matchers and actions (below) will be applied to profiles.
 
 Matchers allowed:
-  `stack.abs_path`
-  `stack.module`
-  `stack.function`
-  `stack.package`
+  * `stack.abs_path`
+  * `stack.module`
+  * `stack.function`
+  * `stack.package`
 
 Actions allowed:
-  `+app`
-  `-app`
+  * `+app`
+  * `-app`
 </Note>
 
 If you use stack traces for grouping, the stack trace rules (previously known as _grouping enhancements_) influence the data that's fed into the grouping algorithm. These rules can be configured on a per-project basis in **[Project] > Settings > Issue Grouping > Stack Trace Rules**.