[Translate ru] Fundamentals -> index (#5624)
[Translate ru] Fundamentals -> index (#5624)

* update contributors list

* copy file

* translate

* Update _contributors.yaml

revert unexpected change

* Update index.md

Co-authored-by: Andrey <ff8f4e59d905897e6df8bdb3541abbdbf7d2b6a9@google.com>

myakura/WebFundamentals,google/WebFundamentals,google/WebFundamentals,myakura/WebFundamentals,myakura/WebFundamentals,google/WebFundamentals,myakura/WebFundamentals,google/WebFundamentals