Bump Externals/sse2neon from `72daa0f` to `4a4645d`

Created by: dependabot[bot]

Bumps Externals/sse2neon from 72daa0f to 4a4645d.

Commits

• 4a4645d Add naming conventions
• 0c0dee0 Reimplement _mm_unpack{hi,lo}_epi64 for Arm64 (#576)
• eaba4fd Clarify intrinsics coverage for extensions
• 339f071 Optimize aeskeygenassist_si128 for Arm64 (#573)
• 2ccb034 Fix _mm_aesenclast_si128 build failure with crypto
• 06b934f CI: Bump dependency versions
• See full diff in compare view

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