Fix debian/watch regex

Signed-off-by: Arthur Diniz <arthurbdiniz@gmail.com>
8 jobs for master in 6 minutes and 7 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Build
passed #394962
build

00:03:07

 
  Test
passed #394967
autopkgtest

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passed #394968
blhc

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passed #394966
allowed to fail
lintian

00:01:27

passed #394969
piuparts

00:02:49

passed #394965
reprotest

00:02:26

passed #394964
test-build-all

00:02:45

passed #394963
test-build-any

00:02:04