docs: added myself (kommendorkapten) as a maintainer

[kommendorkapten]

cc @mnm678 @znewman01

[asraa]

I think it's also time I stepped down - Fredrik you can take my place :D and move me off the list in this change

cc @theupdateframework/go-tuf-maintainers

[kommendorkapten]

@asraa sure, but it makes me sad :(

[kommendorkapten]

Thanks for all the work @asraa ❤️

[trishankatdatadog]

Thank you, @asraa, for all your great work on go-tuf, and @kommendorkapten, for taking up the mantle.

[asraa]

Thank YOU all!!