Update doc/specs/stdlib_linalg.md

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

Author: perazz

doc/specs/stdlib_linalg.md

@@ -901,7 +901,7 @@ Exceptions trigger an `error stop`.
 {!example/linalg/example_determinant2.f90!}
 ```
 
-## `qr` - Compute the QR factorization of a matrix. 
+## `qr` - Compute the QR factorization of a matrix
 
 ### Status