build(deps): bump Externals/sse2neon from `e1b780c` to `b60aa09`

Created by: dependabot[bot]

Bumps Externals/sse2neon from e1b780c to b60aa09.

Commits

• b60aa09 Merge pull request #457 from HowJMay/undefined_ps
• ba34311 test: Add test for _mm_undefined_ps
• 8effde3 Merge pull request #456 from HowJMay/undefined_si128
• f01be72 Merge pull request #430 from HowJMay/undefined_pd
• b91761f feat: Implement _mm_undefined_si128
• a365711 feat: Implement _mm_undefined_pd
• 1ee292a Merge pull request #451 from HowJMay/compare_boolean
• 19e96b3 feat: Implement comi[gt|ge|le|lt]_sd
• 816f7f5 Merge pull request #454 from HowJMay/cvtsi32_sd
• cc0d98a Merge pull request #453 from HowJMay/cvtsi64_sd
• Additional commits viewable in compare view

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