Bump Externals/sse2neon from `e8108fc` to `6a6a03c`

Created by: dependabot[bot]

Bumps Externals/sse2neon from e8108fc to 6a6a03c.

Commits

• 6a6a03c Mention GFAse as a new adoption case
• a387dd5 Merge pull request #550 from howjmay/fix-prefetch
• 4cd4383 fix: Align _mm_prefetch behavior to document
• a302995 Always use FORCE_INLINE to aid compiler optimizations
• dc6fef7 Avoid potential naming conflicts with non-Aarch64 wrappers
• e1ac019 Simplify text processing macros
• e285baa tests: Assume latest clang++
• 86c60c7 Assume _mm_free test case succeeds
• 2d366fc CI: Bump dependency versions
• 923b911 Merge pull request #551 from AymenQ/vec-minpos
• Additional commits viewable in compare view

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