chore: update Pranav's email

PR-URL: #105
Reviewed-by: Athan Reines <kgryte@gmail.com>
Signed-off-by: Pranav Goswami <pranavchiku11@gmail.com>

Author: Pranavchiku

mentors.md

@@ -42,7 +42,7 @@ If you are willing to mentor,
 
 - Pranav Goswami
 
-    - e-mail: [goswami.4@iitj.ac.in](mailto:goswami.4@iitj.ac.in)
+    - e-mail: [pranavchiku11@gmail.com](mailto:pranavchiku11@gmail.com)
     - GitHub: [pranavchiku](https://github.com/pranavchiku)
     - projects: most, particularly implementation of BLAS and mathematical functions