ggml_tensor: update the structure comments. (#3283)

* ggml_tensor: update the structure comments.

* remove semicolon

Co-authored-by: slaren <slarengh@gmail.com>

* Update ggml.h

---------

Co-authored-by: Cebtenzzre <cebtenzzre@gmail.com>
Co-authored-by: slaren <slarengh@gmail.com>

ggml.h

@@ -473,8 +473,8 @@ extern "C" {
         int     n_dims;
         int64_t ne[GGML_MAX_DIMS]; // number of elements
         size_t  nb[GGML_MAX_DIMS]; // stride in bytes:
-                                   // nb[0] = sizeof(type)
-                                   // nb[1] = nb[0]   * ne[0] + padding
+                                   // nb[0] = ggml_type_size(type)
+                                   // nb[1] = nb[0]   * (ne[0] / ggml_blck_size(type)) + padding
                                    // nb[i] = nb[i-1] * ne[i-1]
 
         // compute data