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 12 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Sanity
failed #9381
slurm
test_sanity

00:00:12

 
  Dry Run
skipped #9382
slurm
test_dry_run
 
  Integration
skipped #9385
slurm
expression
skipped #9386
slurm
fusion
skipped #9387
slurm
itd
skipped #9383
slurm
qc_seq
skipped #9384
slurm
snv_indels
 
  Report
skipped #9388
slurm
hamlet_report
 
Name Stage Failure
failed
test_sanity Sanity
No job log