Update release notes for v5.2.0

Author: pnedev

ReleaseNotes.txt

@@ -3,6 +3,8 @@ What's new in v5.2.0
 - Add multi-caret Autocomplete and possibility to triger autocomplete if configurable number of chars are typed
 - Made several Search box improvements related to its autocompletion and the box can now be configured to stay open
 - Toggle window now cycles also through Search box if it is open
+- Enable use of library DBs on other drives
+- Library DB paths (if configured and used) are now shown in results with their absolute paths
 - Update Global GTags binaries to 6.6.12
 - Several other fixes and improvements