fix typo (#5384)

* fix typo

* fix typo

docs/source/Tutorial.md

@@ -424,7 +424,7 @@ The first step is to import/include the library, generated files, etc.
 ~~~
 </div>
 <div class="language-typescript">
-  // note: import flabuffers with your desired import method
+  // note: import flatbuffers with your desired import method
 
   import { MyGame } from './monster_generated';
 </div>

docs/source/TypeScriptUsage.md

@@ -43,7 +43,7 @@ First, include the library and generated code. Then read the file into an
 the ByteBuffer to the `getRootAsMonster` function.
 
 ~~~{.ts}
-  // note: import flabuffers with your desired import method
+  // note: import flatbuffers with your desired import method
 
   import { MyGame } from './monster_generated';