feat(nx-dev): remove emojis from heading ID

[jaysoo]

Having emojis in the deep-link URIs can be problematic when processing the page. For example, when generating embeddings for AI Chat https://nx.dev/concepts/dte#%F0%9F%8E%89-pro:-build-artifacts becomes https://nx.dev/concepts/dte#-pro-build-artifacts.

Better to leave off non-ASCII characters. Side-effect of this PR is that any previous deep-link that contains emojis will no longer work, but it's a small use-case and users are on the right page still (just not deep-linked to specific section).

Current Behavior

Expected Behavior

Related Issue(s)

Fixes #

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 15, 2023 5:34pm

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✅ Successfully ran 8 targets

• nx affected --target=e2e --base=6242c87227c889d494098709173bb61a14e4f1fe --head=62aa63fb4e7293620a3df33268333421b4d535b2 --parallel=1
• nx affected --target=build --base=6242c87227c889d494098709173bb61a14e4f1fe --head=62aa63fb4e7293620a3df33268333421b4d535b2 --parallel=3
• nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• nx affected --target=test --base=6242c87227c889d494098709173bb61a14e4f1fe --head=62aa63fb4e7293620a3df33268333421b4d535b2 --parallel=1
• nx affected --target=lint --base=6242c87227c889d494098709173bb61a14e4f1fe --head=62aa63fb4e7293620a3df33268333421b4d535b2 --parallel=3
• nx-cloud record -- nx format:check --base=6242c87227c889d494098709173bb61a14e4f1fe --head=62aa63fb4e7293620a3df33268333421b4d535b2
• nx documentation --no-dte
• nx affected -t e2e-macos --parallel=1 --base=6242c87227c889d494098709173bb61a14e4f1fe --head=62aa63fb4e7293620a3df33268333421b4d535b2

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[github-actions]

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