adding release notes for 0.5.2

Author: agmoore4

docs/pages/releasenotes/0.5.2.rst

@@ -0,0 +1,15 @@
+0.5.1 (February 19 2025)
+------------------------
+
+This release updates the documentation to reflect changes starting at v0.4.0 and fixes dependency requirements.
+
+Other
+~~~~~~~~~~~~~~
+
+* Updated release notes to include changes starting at v0.4.0.
+
+* Added new survival analysis notebook to the documentation.
+
+* In v0.5.0, scikit-survival was added to requirements.txt but not setup.py. That has been resolved.
+
+* Now requiring python<3.13 for tensorflow