linalg : コード例の関数を修正 (#1233)

Signed-off-by: Yuya Asano <64895419+sukeya@users.noreply.github.com>

Author: sukeya

reference/linalg/symmetric_matrix_rank_2k_update.md

@@ -134,7 +134,7 @@ int main()
 
   // (1)
   std::cout << "(1)\n";
-  std::linalg::symmetric_matrix_rank_k_update(
+  std::linalg::symmetric_matrix_rank_2k_update(
     A,
     B,
     C,
@@ -144,7 +144,7 @@ int main()
   // (2)
   init_symm_mat(C);
   std::cout << "(2)\n";
-  std::linalg::symmetric_matrix_rank_k_update(
+  std::linalg::symmetric_matrix_rank_2k_update(
     std::execution::par,
     A,
     B,