Fix misspelling (#4)

Writerside/topics/ES-Language-Files.md

@@ -4,7 +4,7 @@
 |----------------------|-------|--------------------------------------------------|-------|
 | Bengali              | bn-BD | ❌ File exists but is not enabled, not translated | 1.6.0 |
 | British English      | en-GB | ✅ Fully                                          | 1.0.0 |
-| Chinese (Simplified) | zn-CN | ✅ Fully                                          | 1.6.0 |
+| Chinese (Simplified) | zh-CN | ✅ Fully                                          | 1.6.0 |
 | French               | fr-FR | ⚠ Limited support                                | 1.6.0 |
 | German               | de-DE | ❌ File exists but is not enabled, not translated | 1.6.0 |
 | Hindi                | hi-IN | ❌ File exists but is not enabled, not translated | 1.6.0 |
@@ -31,4 +31,4 @@ These are automatically updated whenever you update your plugin.
 1. Create a new .yml file in the /plugins/essence/languages folder. You should give it a unique name such as custom.yml
 2. Copy the contents of ![en-gb.yml](en-gb.yml.png) to this file.
 3. Customise any messages you wish to.
-4. Change the language option in config.yml to the name of your file without the yml ending (e.g. "custom").
+4. Change the language option in config.yml to the name of your file without the yml ending (e.g. "custom").