[ru] Create webassembly.md

[aprasolova]

Describe your changes

Resolves #3426

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[shurup]

@aprasolova hi! Please rename the file to webassembly.md (a hyphen should not be present to keep consistency with the English version).

[aprasolova]

@aprasolova hi! Please rename the file to webassembly.md (a hyphen should not be present to keep consistency with the English version).

Done