Add WebAssembly to allowed idents

[Centri3]

Closes #10998
changelog: [doc_markdown]: No longer lints WebAssembly

[rustbot]

r? @flip1995

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[Centri3]

r? @Alexendoo (random pick, not sure why flip was assigned)

[Alexendoo]

SGTM. It will have been because it touches /book

@bors r+

[bors]

📌 Commit e3b601a has been approved by Alexendoo

It is now in the queue for this repository.

[bors]

⌛ Testing commit e3b601a with merge 73e31d1...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: Alexendoo
Pushing 73e31d1 to master...

[giraffate]

Can we add the test here?

rust-clippy/tests/ui/doc/doc-fixable.rs

Lines 55 to 76 in 73e31d1

	/// This tests allowed identifiers.
	/// KiB MiB GiB TiB PiB EiB
	/// DirectX
	/// ECMAScript
	/// GPLv2 GPLv3
	/// GitHub GitLab
	/// IPv4 IPv6
	/// ClojureScript CoffeeScript JavaScript PureScript TypeScript
	/// NaN NaNs
	/// OAuth GraphQL
	/// OCaml
	/// OpenGL OpenMP OpenSSH OpenSSL OpenStreetMap OpenDNS
	/// WebGL
	/// TensorFlow
	/// TrueType
	/// iOS macOS FreeBSD
	/// TeX LaTeX BibTeX BibLaTeX
	/// MinGW
	/// CamelCase (see also #2395)
	/// be_sure_we_got_to_the_end_of_it
	fn test_allowed() {
	}