Update doc/for_phd_students.md

Yufeng-He-Javis · marcobarilari · web-flow · commit f2bada23451a · 2024-09-25T15:24:23.000+02:00
Co-authored-by: Marco Barilari &lt;38101692+marcobarilari@users.noreply.github.com&gt;
diff --git a/doc/for_phd_students.md b/doc/for_phd_students.md
@@ -24,7 +24,8 @@ you can find English-version forms for annual meetings, mid-term evaluation and
 
 Each doctoral student in IPSY has a thesis budget to cover some of the expenses (according to certain rules).
 
-## Rules as of June 2023:
+### Rules as of June 2023:
+
 
 There is indeed an envelope of 881 € per PhD student which will be distributed/used as follows: 
 
