[ci] fix typo: gitlab-ci file should point to argopkgs master.

11 jobs for ci-fix in 4 minutes and 6 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Style
passed #19447
flake8

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  Build
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knl
argotk

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passed #19450
integration
containers

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passed #19449
integration
libnrm

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passed #19448
integration
nrm

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  Test
passed #19456
rapl
py.test

00:01:10

passed #19452
integration
testHello

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passed #19453
integration
testListen

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passed #19454
integration
testPerfwrapper

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passed #19455
knl
testPower

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  Quality
passed #19457
integration
repoquality

00:00:23