Http: don't send body on GET requests

[andig]

Fix #14192

@panzerdev could you give it a try?

[panzerdev]

[http  ] TRACE 2024/06/12 20:16:20 GET http://192.168.2.236/rpc/Switch.Set?id=0&on=false
[http  ] TRACE 2024/06/12 20:16:20 {"was_on":true}

[http  ] TRACE 2024/06/12 20:16:17 GET http://192.168.2.236/rpc/Switch.Set?id=0&on=true
[http  ] TRACE 2024/06/12 20:16:17 {"was_on":false}

Bug fixed, sorry I couldn't contribute this myself... children just bring home all kind of illnesses

[andig]

Thanks for confirming 👍🏻