docs: fix async map anchor links in README

[victorpoughon]

Currently, the link in the README outline to ResultAsync.map is broken: it links to Result.asyncMap.

This is because GitHub markdown automatically creates anchor IDs for headings by lower-casing and stripping down the heading text of any non alphanumeric characters. So Result.asyncMap and ResultAsync.map reduce to the same anchor ID.

This gives each heading a unique anchor ID to fix the link.

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 1cb9f2aea8332808f63a4d315b6cd60f431e88f2

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR