[ci] Switch GitlabCI build image to GCC 9

The GCC 8 image (based on Debian Buster) is too old to support the required minimum CMake version 3.18, but the GCC 9 image (based on Debian Bullseye) has v3.18.4.
grandchild · Oct 16, 2024 · d7e66ab · d7e66ab
1 parent 9c42b1d
commit d7e66ab
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: gcc:8
+image: gcc:9
 
 build:
   stage: build