update changelog

Author: Joon-Klaps

CHANGELOG.md

@@ -31,6 +31,7 @@ Thank you to everyone else that has contributed by reporting bugs, enhancements
 - [[PR #435](https://github.com/nf-core/viralrecon/pull/435)] - Changed to a patched cutadapt from nf-core modules, added `skip_noninternal_primers` param to allow users to process primers inside the pipeline, and added `threeprime_adapters` to determine whether primers are 3' or 5' adapters.
 - [[PR #446](https://github.com/nf-core/viralrecon/pull/446)] - Update nextclade & pangolin modules
 - [[PR #450](https://github.com/nf-core/viralrecon/pull/450)] - Patch nf schema - include integer & string as type for sample
+- [[PR #452](https://github.com/nf-core/viralrecon/pull/452)] - Fix `ch_blast_db` to have correct cardinality for blast/blastn
 
 ### Parameters