DOC-3297: Add missing support-version from support table.

Author: kemister85

modules/ROOT/partials/misc/supported-versions.adoc

@@ -6,6 +6,7 @@ Supported versions of {productname}:
 [cols="^,^,^",options="header"]
 |===
 |Version |Release Date |End of Premium Support
+|8.1 |2025-09-17 |2027-03-17
 |8.0 |2025-07-23 |2027-01-23
 |7.9 |2025-05-14 |2026-11-14
 |7.8 |2025-04-09 |2026-10-09