Update download docs

Author: bbimber

SequenceAnalysis/src/org/labkey/sequenceanalysis/run/alignment/BBMapWrapper.java

@@ -227,7 +227,7 @@ public File doAlignment(File inputFastq1, @Nullable File inputFastq2, File outpu
         args.add("overwrite=t");
 
         // Maximum number of total alignments to print per read. Only relevant when secondary=t.
-        args.add("maxsites=-1");
+        args.add("maxsites=50");
 
         // Only print secondary alignments for ambiguously-mapped reads.
         args.add("secondary=t");