docs: add missing period

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/lapack/base/README.md

@@ -94,7 +94,7 @@ For symmetric or Hermitian band matrices with `KD` subdiagonals or superdiagonal
 **Upper Triangle Storage (UPLO = 'U'):**
 
 -   Element `A[i, j]` is stored in `AB[KD+1+i-j, j]`.
--   Valid range for `i`: `max(1, j-KD) <= i <= j`
+-   Valid range for `i`: `max(1, j-KD) <= i <= j`.
 
 **Lower Triangle Storage (UPLO = 'L'):**