Clean up docker networks

[dido18]

After running some examples, the system keeps Docker networks

NETWORK ID     NAME                                                                   DRIVER    SCOPE
9c11949f1085   bridge                                                                 bridge    local
544fd398b294   copy-of-air-quality-on-led-matrix_default                              bridge    local
92d822e82bc7   copy-of-blink-led_default                                              bridge    local
17581116935c   copy-of-system-resources-logger_default                                bridge    local
157a16e1cc88   copy-of-uno-q-pin-toggle_default                                       bridge    local
ad4a88e9c5f0   host                                                                   host      local
ef48c2ddbb7e   local-share-arduino-app-cli-examples-object-detection_default          bridge    local
39fc593a9560   local-share-arduino-app-cli-examples-system-resources-logger_default   bridge    local
5e82ab2cc853   local-share-arduino-app-cli-examples-unoq-pin-toggle_default           bridge    local
81603ecf2254   none                                                                   null      local