fix: typos in documentation files (llama/11791)

* Update ggml.c

* Update arg.cpp

* Update speculative.h

ggml/src/ggml.c

@@ -1379,7 +1379,7 @@ bool ggml_are_same_stride(const struct ggml_tensor * t0, const struct ggml_tenso
         (t0->nb[3] == t1->nb[3]);
 }
 
-// check if t1 can be represented as a repeatition of t0
+// check if t1 can be represented as a repetition of t0
 bool ggml_can_repeat(const struct ggml_tensor * t0, const struct ggml_tensor * t1) {
     static_assert(GGML_MAX_DIMS == 4, "GGML_MAX_DIMS is not 4 - update this function");