Update doc/specs/stdlib_linalg.md

Co-authored-by: Jeremie Vandenplas <jeremie.vandenplas@gmail.com>

Author: perazz

doc/specs/stdlib_linalg.md

@@ -933,7 +933,7 @@ or reduced matrices: \( A = Q_1 R_1 \) (provide `shape(Q)==[m,k]`, `shape(R)==[k
 
 `overwrite_a` (optional): Shall be an input `logical` flag (default: `.false.`). If `.true.`, input matrix `a` will be used as temporary storage and overwritten. This avoids internal data allocation. It is an `intent(in)` argument.
 
-`err` (optional): Shall be a `type(linalg_state_type)` value. This is an `intent(out)` argument.
+`err` (optional): Shall be a `type(linalg_state_type)` value. It is an `intent(out)` argument.
 
 ### Return value