Fix typo in minimal solver docstring

Co-authored-by: ymd-stella <[email protected]>

src/stella_vslam/solve/essential_solver.h

@@ -53,7 +53,7 @@ class essential_solver {
     static Mat33_t create_E_21(const Mat33_t& rot_1w, const Vec3_t& trans_1w, const Mat33_t& rot_2w, const Vec3_t& trans_2w);
 
 private:
-    //! Compute an essential matrix with 5-point algorithm from Stewenius et al. (accepts 5 or more corresponding sets of bearing vectors). but works best
+    //! Compute essential matrices with 5-point algorithm from Stewenius et al. (accepts 5 or more corresponding sets of bearing vectors). but works best
     // when used with RANSAC since it can produce up to 10 feasible essential matrices that need to be validated
     std::vector<Mat33_t> compute_E_21_minimal(const eigen_alloc_vector<Vec3_t>& x1, const eigen_alloc_vector<Vec3_t>& x2);