Update .gitlab-ci.yml

2 jobs for master in 1 minute and 9 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #32299
make_markdown_outils

00:00:18

 
  Test
failed #32300
pages

00:00:50

 
Name Stage Failure
failed
pages Test
    creating build/temp.linux-x86_64-3.7/bundled/zeromq/tweetnacl/contrib
creating build/temp.linux-x86_64-3.7/bundled/zeromq/tweetnacl/contrib/randombytes
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -DTHREAD_STACK_SIZE=0x100000 -fPIC -DZMQ_HAVE_CURVE=1 -DZMQ_USE_TWEETNACL=1 -DZMQ_USE_EPOLL=1 -Ibundled/zeromq/include -Ibundled/zeromq/tweetnacl/src -Ibundled/zeromq/tweetnacl/contrib/randombytes -Ibundled -I/usr/local/include/python3.7m -c buildutils/initlibzmq.c -o build/temp.linux-x86_64-3.7/buildutils/initlibzmq.o
unable to execute 'gcc': No such file or directory
error: command 'gcc' failed with exit status 1

----------------------------------------
Command "/usr/local/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-ffmrsfcl/pyzmq/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-record-guz_pvtv/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-install-ffmrsfcl/pyzmq/
ERROR: Job failed: exit code 1