Fix typo (#900)

Author: bigwheel

docs/esmodules.md

@@ -12,9 +12,9 @@ import { nodeResolve } from "@rollup/plugin-node-resolve";
 
 const extensions = [".ts", ".js"];
 
-const preventThreeShakingPlugin = () => {
+const preventTreeShakingPlugin = () => {
     return {
-      name: 'no-threeshaking',
+      name: 'no-treeshaking',
       resolveId(id, importer) {
         if (!importer) {
             // let's not theeshake entry points, as we're not exporting anything in Apps Script files
@@ -32,7 +32,7 @@ export default {
     format: "esm",
   },
   plugins: [
-    preventThreeShakingPlugin(),
+    preventTreeShakingPlugin(),
     nodeResolve({
       extensions,
     }),
@@ -78,4 +78,4 @@ node_modules/**
 
 Now you can push using your normal `clasp push`-command!
 
-This should be enough to start developing a project using ES Modules. A complete example repo can be cloned from [atti187/esmodules](https://github.com/atti187/esmodules).
+This should be enough to start developing a project using ES Modules. A complete example repo can be cloned from [atti187/esmodules](https://github.com/atti187/esmodules).