[Doc][KDB] MIOpen installation documentation needs updates

[junliume]

This documentation needs an update: https://docs.amd.com/bundle/MIOpen_gh-pages/page/install.html#installing-miopen-kernels-package

Originally posted by @jithunnair-amd in #2136 (comment)

[ppanchad-amd]

@junliume Does the documentation still need to be updated? If so, please let me know and I can go ahead and file an internal ticket to get it fixed? Thanks!