Updates contributor list

Author: liss-bot

.github/README.md

@@ -435,7 +435,7 @@ Below is an outline + current status of each workflow.
     </td>
     <td align="center">
         <a href="https://github.com/semiceau">
-            <img src="https://avatars.githubusercontent.com/u/50425951?v=4" width="80;" alt="semiceau"/>
+            <img src="https://avatars.githubusercontent.com/u/50425951?u=f8c386b966312769f559422adf0dbc7e2f116258&v=4" width="80;" alt="semiceau"/>
             <br />
             <sub><b>GT</b></sub>
         </a>
@@ -469,6 +469,13 @@ Below is an outline + current status of each workflow.
             <sub><b>Terminal Trove</b></sub>
         </a>
     </td>
+    <td align="center">
+        <a href="https://github.com/st617">
+            <img src="https://avatars.githubusercontent.com/u/128325650?v=4" width="80;" alt="st617"/>
+            <br />
+            <sub><b>Null</b></sub>
+        </a>
+    </td>
     <td align="center">
         <a href="https://github.com/nrvo">
             <img src="https://avatars.githubusercontent.com/u/151435968?u=e1dcb307fd0efdc45cddbe9490a7b956e4da6835&v=4" width="80;" alt="nrvo"/>