chore: fix grammar

Author: aayush0325

lib/node_modules/@stdlib/stats/base/dsemyc/docs/repl.txt

@@ -33,7 +33,7 @@
         Input array.
 
     strideX: integer
-        Stride Length.
+        Stride length.
 
     Returns
     -------
@@ -89,7 +89,7 @@
         Input array.
 
     strideX: integer
-        Stride Length.
+        Stride length.
 
     offsetX: integer
         Starting index.