Move back to testing packages on main

conandata.yml

@@ -1,9 +1,9 @@
 version: "5.8.0-alpha.0"
 requirements:
-  - "uranium/(latest)@ultimaker/stable"
-  - "curaengine/(latest)@ultimaker/stable"
-  - "cura_binary_data/(latest)@ultimaker/stable"
-  - "fdm_materials/(latest)@ultimaker/stable"
+  - "uranium/(latest)@ultimaker/testing"
+  - "curaengine/(latest)@ultimaker/testing"
+  - "cura_binary_data/(latest)@ultimaker/testing"
+  - "fdm_materials/(latest)@ultimaker/testing"
   - "curaengine_plugin_gradual_flow/0.1.0-beta.3"
   - "dulcificum/latest@ultimaker/testing"
   - "pysavitar/5.3.0"