update CHANGELOG

CHANGELOG

@@ -11,6 +11,12 @@ Release 3.3.0
 * Check for and report non-planar rings in the modelling result. This check is
   also incorporated in energy minimization, potentially increasing the number
   of minimization steps.
+* Algorithms using large model databases as template libraries for modelling.
+  Sequence search: PentaMatch, a k-mer based sequence search with extreme speed
+  but low sensitivity (similar implementation as
+  https://www.rbvi.ucsf.edu/chimerax/data/kmer-aug2022/kmer_search.html).
+  Structure storage: FSStructureServer, an OMF (OpenStructure Minimal Format)
+  based structure storage that compresses AFDB v4 (214E6 entries) to 1.4TB.
 * Several minor bug fixes, improvements, and speed-ups.
 
 Release 3.2.1