[CI] Update core config for DEMO F030F4

Build only the default sketch (BareMinimum.ino)

Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

Diff for: CI/build/conf/cores_config.json

@@ -14,6 +14,11 @@
         }
       ],
       "sketches": [
+        {
+          "pattern": "^((?!BareMinimum.ino).)*$",
+          "applicable": false,
+          "boards": [ "DEMO_F030F4" ]
+        },
         {
           "pattern": "DISCO_IOT_|M24SR64-Y|MX25R6435F",
           "applicable": true,