[Bugfix] fix _kv_cache_transpose_append buffer read region error (#2277)

* improve Install via environment variable

* [HotFix] fix kv_cache_transpose_append buffer region

Author: JackWeiw

python/mlc_llm/nn/kv_cache.py

@@ -399,7 +399,7 @@ def tir_kv_cache_transpose_append(
                     pages[T.floordiv(position, 16), 0, vh, T.floormod(position, 16), vf] = k_data[vgpos, vh, vf]
                 with T.block("v_transpose_append"):
                     vgpos, vh, vf = T.axis.remap("SSS", [global_pos, h, f])
-                    T.reads(position_map[vgpos], k_data[vgpos, vh, vf])
+                    T.reads(position_map[vgpos], v_data[vgpos, vh, vf])
                     T.writes(pages[position_map[vgpos] // 16, 1, vh, position_map[vgpos] % 16, vf])
                     position: T.int32 = position_map[vgpos] # type: ignore[name-defined,no-redef]
                     pages[T.floordiv(position, 16), 1, vh, T.floormod(position, 16), vf] = v_data[vgpos, vh, vf]