tests: update tests on '-x' and '-X'

We just want to check whether the good number of reads has been considered.

algo/tests/should-get-tests/stanford-X100-sampled.should-get

@@ -4,4 +4,4 @@ $ Skip the good number of reads
 1:Processing every 131th read
 
 $ Analyze the good number of reads
-1: found 100 ..-windows in 100 reads .100. of 100 reads
+1: found .* of 100 reads

algo/tests/should-get-tests/stanford-x100-first.should-get

 !LAUNCH: $VIDJIL_DIR/vidjil -y 0 -x 100 -G $VIDJIL_DIR/germline/IGH $VIDJIL_DIR/data/Stanford_S22.fasta
 
 $ Analyze the good number of sequences in Stanford S22 
-1: found 99 ..-windows in 100 reads .100. of 100 reads
+1: found .* of 100 reads