[gnome-control-center] ci: Fix typo in variable value

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 1c977966468d448b749dd0c8d7c32c539e2b6c9e
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sun Nov 18 23:31:28 2018 -0200

    ci: Fix typo in variable value

 .gitlab-ci.yml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9dc1b4c01..4e43e2e68 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -60,7 +60,7 @@ build:
 
   except:
     variables:
-      - $CI_PIPELINE_SOURCE == "scheduled"
+      - $CI_PIPELINE_SOURCE == "schedule"
 
 ##
 # Stage: Test
@@ -90,7 +90,7 @@ test:
 
   except:
     variables:
-      - $CI_PIPELINE_SOURCE == "scheduled"
+      - $CI_PIPELINE_SOURCE == "schedule"
       - $CI_COMMIT_TITLE =~ /^Update.*translation$/
 
 # Runs the coverage test.
@@ -117,7 +117,7 @@ coverage:
 
   except:
     variables:
-      - $CI_PIPELINE_SOURCE == "scheduled"
+      - $CI_PIPELINE_SOURCE == "schedule"
       - $CI_COMMIT_TITLE =~ /^Update.*translation$/
 
 # Runs the address sanitizer.
@@ -245,7 +245,7 @@ stop_review:
 
   except:
     variables:
-      - $CI_PIPELINE_SOURCE == "scheduled"
+      - $CI_PIPELINE_SOURCE == "schedule"
       - $CI_COMMIT_TITLE =~ /^Update.*translation$/
 
 asan:
@@ -296,7 +296,7 @@ msan:
 
   except:
     variables:
-      - $CI_PIPELINE_SOURCE == "scheduled"
+      - $CI_PIPELINE_SOURCE == "schedule"
       - $CI_COMMIT_TITLE =~ /^Update.*translation$/
 
 armv8: