Update expunge-assist.md with two UX Research Co-leads (#8356)

* chore: update website project profile

Removed Siyun Feng from leadership on the website project profile.

* added two co-leads to _projects/expunge-assist.md

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Co-authored-by: Myron Chen <[email protected]>

Author: kdaca19xx

_projects/expunge-assist.md

@@ -55,6 +55,20 @@ leadership:
       slack: https://hackforla.slack.com/team/U06E78YCUUB
       github: https://github.com/giselledizon
     picture: https://avatars.githubusercontent.com/giselledizon
+  - name: Namitha Murali
+    github-handle: namithamurali23
+    role: UX Research, Co-Lead
+    links:
+      slack: https://hackforla.slack.com/team/U091S2Q6LSY
+      github: https://github.com/namithamurali23
+    picture: https://avatars.githubusercontent.com/namithamurali23
+  - name: Prakriti Dumaru
+    github-handle: Pra-kriti
+    role: UX Research, Co-Lead
+    links:
+      slack: https://hackforla.slack.com/team/U08EARZC33K
+      github: https://github.com/Pra-kriti
+    picture: https://avatars.githubusercontent.com/Pra-kriti
   - name: Rachel Ichniowski
     github-handle: raeraeicky
     role: Product Manager, UX Research and Content