Update .gitlab-ci.yml

Typo…
2 jobs for master in 1 minute and 20 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #69
alpine docker
build-clang

00:00:28

passed #68
alpine docker
build-gcc

00:00:51

 
Name Stage Failure
failed
build-clang Build There is an unknown failure, please try again
#define PACKAGE_VERSION "0.10-18-g44d23d2"
#define PACKAGE_STRING "opusfile 0.10-18-g44d23d2"
#define PACKAGE_BUGREPORT "opus@xiph.org"
#define PACKAGE_URL ""

configure: exit 77
$ make
make: *** No targets specified and no makefile found. Stop.
ERROR: Job failed: exit code 2