build(deps): bump Externals/sse2neon from 29716df to 706d3b5

Bumps [Externals/sse2neon](https://github.com/DLTcollab/sse2neon) from `29716df` to `706d3b5`.
- [Release notes](https://github.com/DLTcollab/sse2neon/releases)
- [Commits](DLTcollab/sse2neon@29716df...706d3b5)

---
updated-dependencies:
- dependency-name: Externals/sse2neon
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>