[MOD-20661] Bump SVS to fix the build with GCC 16 (#1090)

SVS v0.5.0's svs/core/allocator.h uses std::mutex without including
<mutex>, which GCC 16's libstdc++ no longer provides transitively.
Advance the submodule by the single upstream fix commit on top of
v0.5.0 (intel/ScalableVectorSearch#397).

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: alonre24