docs: add tencent/hy-mt2-1.8b (#496)

Author: Lookoff-AIMLAPI

docs/SUMMARY.md

@@ -321,6 +321,7 @@
     * [Switchpoint Router](api-references/text-models-llm/switchpoint/router.md)
   * [Tencent](api-references/text-models-llm/tencent/README.md)
     * [Hy3](api-references/text-models-llm/tencent/hy3.md)
+    * [Hy Mt2 1.8B](api-references/text-models-llm/tencent/hy-mt2-1.8b.md)
   * [TheDrummer](api-references/text-models-llm/TheDrummer/README.md)
     * [Cydonia 24B V4.1](api-references/text-models-llm/TheDrummer/cydonia-24b-v4.1.md)
     * [Rocinante 12B](api-references/text-models-llm/TheDrummer/rocinante-12b.md)