* Update tinycam.md to include official instructions
Since tinyCam version 10.2 there is a Xiaomi Dafang camera that can be used, therefore eliminating the need for custom_vendors.xml.
I left the custom_vendors.xml instructions in case someone needs it, but I'm not opposed to removing it.
* Update tinycam.md
remove outdated way
Co-authored-by: jmtatsch <jmtatsch@users.noreply.github.com>