Update CI.yml to skip integration tests (#2596)

Exclude integration tests from CI workflow, they're run in a dedicated workflow.

[skip ci]

Author: giordano

.github/workflows/CI.yml

@@ -7,6 +7,7 @@ on:
       - 'lib/**'
       - 'src/**'
       - 'test/**'
+      - '!test/integration/**'
       - 'Project.toml'
   push:
     branches:
@@ -18,6 +19,7 @@ on:
       - 'lib/**'
       - 'src/**'
       - 'test/**'
+      - '!test/integration/**'
       - 'Project.toml'
     tags: '*'