fix: Resolve benchmark_search

[sbstndb]

-	The new samurai::find() requires a xt::xtensor_fixed instead of a std::array
-	This modification allows the benchmark to compile and run successfully

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Description

The file benchmark_search.cpp is no longer up to date. It requires a modification according to a change in algorithm.hpp here : bc93fef#diff-e48e062924e95ca5a9ca5d59cfd9844509d6c8152a986cc8c304f0c7a030dd47L250

Related issue

Previously, the benchmark doesn't compile due to the following error :

error: no matching function for call to ‘find(samurai::CellArray<1, samurai::Interval<int, long long int>, 20>::lca_type&, std::array<int, 1>&)’

How has this been tested?

The benchmark have been run with coherent results with GCC@14 and LLVM@16

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