Updated 1-design-promotional-poster-20-share.md with (#7791)

Added my own entry to the list with the following poster:
### Points:
300
<br/>

![twenty](https://github.com/user-attachments/assets/bd7648a5-8012-4d73-a992-b8e7e8ed08a0)

oss-gg/twenty-design-challenges/1-design-promotional-poster-20-share.md

@@ -25,4 +25,7 @@ Your turn 👇
 » 14-October-2024 by [AliYar-Khan](https://oss.gg/AliYar-Khan) poster Link: [poster](https://x.com/Mr_Programmer14/status/1845888855183884352)
 
 » 16-October-2024 by [Harsh BHat](https://oss.gg/harshsbhat) poster Link: [poster](https://x.com/HarshBhatX/status/1846233330435477531)
+
+» 17-October-2024 by [Atharva Deshmukh](https://oss.gg/Atharva-3000) poster Link: [poster](https://x.com/0x_atharva/status/1846915861191577697)
+
 ---