[Docs Site] Bump sharp from 0.34.2 to 0.34.3 (cloudflare#23573)

Bumps [sharp](https://github.com/lovell/sharp) from 0.34.2 to 0.34.3.
- [Release notes](https://github.com/lovell/sharp/releases)
- [Commits](lovell/sharp@v0.34.2...v0.34.3)

---
updated-dependencies:
- dependency-name: sharp
  dependency-version: 0.34.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]