Update jinja template to use floats instead of int

This fixes a crash in the generation of the pdf report when there is
expression of the MECOM gene. If there is MECOM expression, the read
counts are actually floats, not integers, which leads to a crash.
8 jobs for master in 10 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Sanity
failed #8966
slurm
test_sanity

00:00:10

 
  Dry Run
skipped #8967
slurm
test_dry_run
 
  Integration
skipped #8970
slurm
expression
skipped #8971
slurm
fusion
skipped #8972
slurm
itd
skipped #8968
slurm
qc_seq
skipped #8969
slurm
snv_indels
 
  Report
skipped #8973
slurm
hamlet_report
 
Name Stage Failure
failed
test_sanity Sanity
No job log