Add PlugUpdate error to README (#104)

* Add plugupdate error

* Update doc

Author: heavenshell

README.md

@@ -25,6 +25,26 @@ Plug 'heavenshell/vim-jsdoc', {
 \}
 ```
 
+<details><summary>PlugUpdate error</summary>
+<p>
+  If you got `yarn.lock` related error,
+
+  ```console
+  error: Your local changes to the following files would be overwritten by merge:
+      lib/yarn.lock
+  ```
+
+  Run following command
+
+  ```
+  cd /path/to/plugged/vim-jsdoc
+  git checkout -- yarn.lock
+  ```
+
+  and re-run `PlugUpdate`
+</p>
+</details>
+
 ### Manual Installation
 
 Since version 2.0.0, jsdoc.vim requires a local copy [lehre](https://www.npmjs.com/package/lehre) installed to the plugin directory.

doc/jsdoc.txt

@@ -116,6 +116,11 @@ g:jsdoc_lehre_path					*g:jsdoc_lehre_path*
 >
 ==============================================================================
 CHANGELOG					*jsdoc-changelog*
+2021-02-15
+- Update README
+  See https://github.com/heavenshell/vim-jsdoc/issues/103 details.
+  (thx @boblannon)
+
 2020-10-10
 - Fix async bug
   See https://github.com/heavenshell/vim-jsdoc/issues/99 details.