perf: autobump bio/hisat2/index (#815)

Automatic update of bio/hisat2/index.

Co-authored-by: snakedeploy-bot[bot] <115615832+snakedeploy-bot[bot]@users.noreply.github.com>
Co-authored-by: Johannes Köster <johannes.koester@uni-due.de>

bio/hisat2/index/environment.yaml

@@ -3,5 +3,5 @@ channels:
   - bioconda
   - nodefaults
 dependencies:
-  - hisat2 =2.1
-  - samtools =1.15
+  - hisat2 =2.2.1
+  - samtools =1.16.1