chore(deps): update fumadocs packages to v15.6.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	OpenSSF
fumadocs-core (source)	dependencies	patch	15.6.2 -> 15.6.3
fumadocs-ui (source)	dependencies	patch	15.6.2 -> 15.6.3

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Release Notes

fuma-nama/fumadocs (fumadocs-core)

v15.6.3

Compare Source

Patch Changes

• a2d7940: Fix layout: remove reserved sidebar space when sidebar is disabled in DocsLayout
  • fumadocs-core@15.6.3

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Summary by Sourcery

Bump fumadocs-core and fumadocs-ui to v15.6.3 to apply the latest patch.

Bug Fixes:

• Remove reserved sidebar space when the DocsLayout sidebar is disabled.

Chores:

• Update fumadocs-core and fumadocs-ui dependencies from v15.6.2 to v15.6.3.