Add #!/usr/bin/php to map-poller.php

[pepperoni-pi]

Adding this line seems to be the fix for getting the editor to start working again after my upgrade to PHP8.1. Without this line, edits never get applied and don't display in the WebUI.

[pepperoni-pi]

Explicitly calling php in the cron file also addresses the issue.

Before:
*/5 * * * * librenms /opt/librenms/html/plugins/Weathermap/map-poller.php >> /dev/null 2>&1

After:
*/5 * * * * librenms php /opt/librenms/html/plugins/Weathermap/map-poller.php >> /dev/null 2>&1

[BarbarossaTM]

This has already been included as part of 4ce6ad1