Remove extra indentations in triage/issue-tracker.rst (python#1520)

Author: Yuki Kobayashi

triage/issue-tracker.rst

@@ -57,10 +57,10 @@ will ask you to do so now.
 First you need to select what kind of problem you want to report. The
 available choices include, for example:
 
- * **Bug report**: an existing feature isn't working as expected.
- * **Documentation**: there is missing, invalid, or misleading documentation.
- * **Feature or enhancement**: suggest a new feature for Python.
- * **Report a security vulnerability**: privately report a security vulnerability.
+* **Bug report**: an existing feature isn't working as expected.
+* **Documentation**: there is missing, invalid, or misleading documentation.
+* **Feature or enhancement**: suggest a new feature for Python.
+* **Report a security vulnerability**: privately report a security vulnerability.
 
 Depending on your choice, a dedicated form template will appear.
 In particular, you'll notice that the last button actually takes you to