update release notes

Author: FabianHofmann

doc/release_notes.rst

@@ -4,11 +4,21 @@ Release Notes
 Upcoming Version
 ----------------
 
-* Fix docs (pick highs solver)
-* Add the `sphinx-copybutton` to the documentation
+Version 0.6.2
+--------------
+
+**Features**
+
 * Add ``auto_mask`` parameter to ``Model`` class that automatically masks variables and constraints where bounds, coefficients, or RHS values contain NaN. This eliminates the need to manually create mask arrays when working with sparse or incomplete data.
+
+**Performance**
+
 * Speed up LP file writing by 2-2.7x on large models through Polars streaming engine, join-based constraint assembly, and reduced per-constraint overhead
+
+**Bug Fixes**
+
 * Fix multiplication of constant-only ``LinearExpression`` with other expressions
+* Fix docs and Gurobi license handling
 
 Version 0.6.1
 --------------