doc: fix broken Napi::ThreadSafeFunction link (#1172)

* docs: fix broken link `Napi::ThreadSafeFunction`

Author: F3n67u

doc/hierarchy.md

@@ -81,7 +81,7 @@
 [`Napi::Reference<Napi::Object>`]: ./reference.md
 [`Napi::String`]: ./string.md
 [`Napi::Symbol`]: ./symbol.md
-[`Napi::ThreadSafeFunction`]: ./thread_safe_function.md
+[`Napi::ThreadSafeFunction`]: ./threadsafe_function.md
 [`Napi::TypeError`]: ./type_error.md
 [`Napi::TypedArray`]: ./typed_array.md
 [`Napi::TypedArrayOf`]: ./typed_array_of.md

package.json

@@ -351,6 +351,10 @@
     {
       "name": "Ziqiu Zhao",
       "url": "https://github.com/ZzqiZQute"
+    },
+    {
+      "name": "Feng Yu",
+      "url": "https://github.com/F3n67u"
     }
   ],
   "description": "Node.js API (Node-API)",