Update MAINTAINERS.md

Author: amaydixit11

MAINTAINERS.md

@@ -2,7 +2,7 @@
 
 | Name          | GitHub Handle    | Role             | Tenure | Time Period |
 |---------------|------------------|------------------|------|---------|
-| Ashish Kumar Dash      | [@Ashish-Kumar-Dash](https://github.com/Ashish-Kumar-Dash) | Mentor (Sprint-M25, Hacktoberfest 2025, FOSS Overflow 2025-26) | 2025-26 | August 2025 - Present |
+| Ashish Kumar Dash      | [@Ashish-Kumar-Dash](https://github.com/Ashish-Kumar-Dash) | Mentor (Sprint-M25, Hacktoberfest 2025) | 2025-26 | August 2025 - January 2026 |
 | Sri Varshith      | [@Sri-Varshith](https://github.com/Sri-Varshith) | Mentor (Hacktoberfest 2025) | 2025-26 | October 2025 - October 2025 |
 | Chaitanya Bisht | [@chaitanyabisht](https://github.com/chaitanyabisht) | Mentor (FOSS OverFlow 2022-23) | 2022-23 | November 2022 - January 2023 |
 | Sudeep Ranjan Sahoo | [@srs-sudeep](https://github.com/srs-sudeep) | Mentee (FOSS OverFlow 2022-23) | 2022-23 | December 2022 - January 2023 |