doc: added changelog for v2.7.0

Author: mrava87

CHANGELOG.md

@@ -5,6 +5,18 @@ Changelog
 * Added cubic spline interpolation operator via
   `pylops.signalprocessing.interpspline.InterpCubicSpline` (also interfaceable via
   `pylops.signalprocessing.interp.Interp(..., kind="cubic_spline"`)
+* Added `pylops.medical.MRI2D` operator
+* Added `pylops.basicoperators.SmoothingND` operator
+* Added 3d extension to `pylops.utils.signalprocessing.pwd_slope_estimate`
+* Fixed unwanted upcasting in `pylops.avo.AVOLinearModelling`,
+  `pylops.Laplacian`, `pylops.signalprocessing.Bilinear`,
+  `pylops.signalprocessing.Interp`, `pylops.signalprocessing.NonStationaryFilters2D`,
+  `pylops.signalprocessing.Seislet`, `pylops.signalprocessing.Sliding1D`,
+  `pylops.signalprocessing.Sliding2D`, `pylops.signalprocessing.Sliding3D`,
+  `pylops.basicoperators.Smoothing1D`, `pylops.basicoperators.Smoothing2D`,
+  and `pylops.waveeqprocessing.Marchenko`
+* Improved typing annotations across all operators (and enforced use of
+  Literal for parameters with multiple options)
 
 # 2.6.0
 * Added `pylops.medical` module and `pylops.medical.CT2D` operator

docs/source/changelog.rst

@@ -4,6 +4,27 @@
 ############################
 
 
+Version 2.7.0
+-------------
+
+*Released on: 17/05/2026*
+
+* Added cubic spline interpolation operator via
+  :py:class:`pylops.signalprocessing.InterpCubicSpline` (also interfaceable via
+  :py:class:`pylops.signalprocessing.Interp` with `kind="cubic_spline"`)
+* Added :py:class:`pylops.medical.MRI2D` operator
+* Added :py:class:`pylops.SmoothingND` operator
+* Added 3d extension to :py:func:`pylops.utils.signalprocessing.pwd_slope_estimate`
+* Fixed unwanted upcasting in :py:class:`pylops.avo.avo.AVOLinearModelling`,
+  :py:class:`pylops.Laplacian`, :py:class:`pylops.signalprocessing.Bilinear`,
+  :py:class:`pylops.signalprocessing.Interp`, :py:class:`pylops.signalprocessing.NonStationaryFilters2D`,
+  :py:class:`pylops.signalprocessing.Seislet`, :py:class:`pylops.signalprocessing.Sliding1D`,
+  :py:class:`pylops.signalprocessing.Sliding2D`, :py:class:`pylops.signalprocessing.Sliding3D`,
+  :py:class:`pylops.Smoothing1D`, :py:class:`pylops.Smoothing2D`,
+  and :py:class:`pylops.waveeqprocessing.Marchenko`
+* Improved typing annotations across all operators (and enforced use of 
+  Literal for parameters with multiple options)
+
 Version 2.6.0
 -------------