Merge pull request #12513 from hashicorp/backport/patch-1/genuinely-alive-cow

This pull request was automerged via backport-assistant

website/content/docs/plugins/install-plugins.mdx

@@ -153,7 +153,7 @@ various outputs, like error messages.
 * [`packer init`](/packer/docs/commands/init) will install plugins in the **last** directory
 in the following numbered list.
 
-1. `PACKER_PLUGINS_PATH` if set will be the sole location for installing plugins. All other 
+1. `PACKER_PLUGIN_PATH` if set will be the sole location for installing plugins. All other 
 plugin directories will be ignored. 
 1. `PACKER_CONFIG_DIR`\plugins on Windows systems, or `PACKER_CONFIG_DIR`/plugins on all other systems.