Merge pull request #2960 from devitocodes/dependabot/pip/distributed-lt-2026.6.1

pip prod(deps): update distributed requirement from <2026.3.1 to <2026.6.1

Author: mloubout

requirements-optional.txt

@@ -2,6 +2,6 @@ matplotlib<3.10.9
 pillow>11,<12.2.1
 pyrevolve==2.2.7
 scipy<1.15.4
-distributed<2026.3.1
+distributed<2026.6.1
 click<9.0
 cloudpickle<3.1.3