Update HISTORY.rst.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

HISTORY.rst

@@ -8,6 +8,7 @@ History
 Maintenance:
 * !112: Adapted SLIC segmentation to scikit-image 0.20.0 (fixes #103).
 * !114: Dropped Python 3.6/3.7 support and add 3.9, 3.10, and 3.11 instead.
+* !115: Moved linting into separate CI job.
 
 
 0.18.0 (2022-02-04)