Fixed typo in comment

Author: SebastianApel

ggml.c

@@ -1997,8 +1997,8 @@ static void ggml_vec_dot_q4_0(const int n, float * restrict s, const void * rest
             x_high_q = _mm256_sub_epi16( x_high_q, offset_8 ); 
             x_low_q = _mm256_sub_epi16( x_low_q, offset_8 ); 
 
-            /* get input from x 
-               Input: 32 Nibbles (16 bytes) at *x[i+u] 
+            /* get input from y 
+               Input: 32 Nibbles (16 bytes) at *y[i+u] 
                Output: 2 vectors with 16 values of type int16_t (y_high_q, y_low_q) */             
 
             /* Load 16 bytes from memory */