doc: Updates Terraform Compatibility Matrix documentation (#3123)

Co-authored-by: maastha <[email protected]>

Author: svc-apix-Bot

docs/index.md

@@ -179,6 +179,7 @@ For more information on configuring and managing programmatic API Keys see the [
 <!-- MATRIX_PLACEHOLDER_START -->
 | HashiCorp Terraform Release | HashiCorp Terraform Release Date  | HashiCorp Terraform Full Support End Date  | MongoDB Atlas Support End Date |
 |:-------:|:------------:|:------------:|:------------:|
+| 1.11.x | 2025-02-27 | 2027-02-28 | 2027-02-28 |
 | 1.10.x | 2024-11-27 | 2026-11-30 | 2026-11-30 |
 | 1.9.x | 2024-06-26 | 2026-06-30 | 2026-06-30 |
 | 1.8.x | 2024-04-10 | 2026-04-30 | 2026-04-30 |