prepare release v0.6.1

Author: lkstrp

doc/release-notes.rst

@@ -4,6 +4,9 @@ Release Notes
 .. Upcoming Version
 .. ----------------
 
+Version 0.6.1 (15.01.2025)
+
+* Bugfix: Remove duplicate conventional power plants coming from different OPSD input files (https://github.com/PyPSA/powerplantmatching/pull/213).
 
 Version 0.6.0 (18.09.2024)
 ---------------------------
@@ -13,8 +16,6 @@ Version 0.6.0 (18.09.2024)
 * Bugfix: Consistently rename countries, affecting power plants in Czech Republic and
   Moldova (https://github.com/PyPSA/powerplantmatching/pull/204).
 
-* Bugfix: Remove duplicate conventional power plants coming from different OPSD input files
-
 * See full list of changes `here <https://github.com/PyPSA/powerplantmatching/releases/tag/v0.6.0>`__.
 
 Version 0.5.19 (16.09.2024)