ggml-metal: fix custom rope

Author: jxy

ggml-metal.m

@@ -876,7 +876,7 @@ void ggml_metal_graph_compute(
 
                             float freq_base, freq_scale;
                             memcpy(&freq_base, (int32_t *) src1->data + 4, sizeof(float));
-                            memcpy(&freq_scale, (int32_t *) src1->date + 5, sizeof(float));
+                            memcpy(&freq_scale, (int32_t *) src1->data + 5, sizeof(float));
 
                             [encoder setComputePipelineState:ctx->pipeline_rope];
                             [encoder setBuffer:id_src0 offset:offs_src0 atIndex:0];