fix some file extensions

Task/Knuth-shuffle/VBScript/knuth-shuffle-1.vb

@@ -0,0 +1,19 @@
+function shuffle( a )
+	dim i
+	dim r
+	randomize timer
+	for i = lbound( a ) to ubound( a )
+		r = int( rnd * ( ubound( a ) + 1 )  )
+		if r <> i then
+			swap a(i), a(r)
+		end if
+	next
+	shuffle = a
+end function
+
+sub swap( byref a, byref b )
+	dim tmp
+	tmp = a
+	a = b
+	b = tmp
+end sub