Update README.md

Author: mlin

README.md

@@ -6,7 +6,7 @@ This [SQLite3 loadable extension](https://www.sqlite.org/loadext.html) adds feat
 
 * genomic range indexing for overlap queries & joins
 * streaming storage compression (also available [standalone](https://github.com/mlin/sqlite_zstd_vfs))
-* in-SQL utility functions, e.g. parsing "chr1:2,345-6,789"
+* in-SQL utility functions, e.g. reverse-complement DNA, parse "chr1:2,345-6,789"
 * pre-tuned settings for "big data"
 
 This October 2020 poster discusses the context and long-run ambitions: