CI: specify environment for tests-ci

Author: lucascolley

.github/workflows/linux.yml

@@ -32,4 +32,4 @@ jobs:
           cache: true
           environments: ${{ matrix.environment }}
       - name: Run tests
-        run: pixi run tests-ci
+        run: pixi run --environment=tests-ci tests-ci

pixi.toml

@@ -106,4 +106,4 @@ tests-ci.cwd = "."
 
 [environments]
 default = { features = ["build", "tests"], solve-group = "default" }
-tests-ci = { features = ["tests-ci"], solve-group = "default" }
+tests-ci = { features = ["build", "tests", "tests-ci"], solve-group = "default" }