fix docs links

Author: ilyaluk

docs/README.md

@@ -2,7 +2,7 @@
 The External plugin allows to communicate with external programs
 
 Contents:
-- [index](/docs/datasources/index.mdx)
-- [data source json](/docs/datasources/json.mdx)
-- [data source raw](/docs/datasources/raw.mdx) 
+- [index](/packer/plugins/datasources/index.mdx)
+- [data source json](/packer/plugins/datasources/json.mdx)
+- [data source raw](/packer/plugins/datasources/raw.mdx) 
 

docs/datasources/index.mdx

@@ -10,9 +10,9 @@ sidebar_title: Overview
 The External plugin is able to communicate with external commands.
 The following data sources are currently supported:
 
-- [json](/docs/datasources/external/json) - Communicate with external commands
+- [json](/packer/plugins/datasources/external/json) - Communicate with external commands
   using JSON protocol.
-- [raw](/docs/datasources/external/raw) - Communicate with external commands
+- [raw](/packer/plugins/datasources/external/raw) - Communicate with external commands
   using plaintext protocol.
 
 ## Installation

docs/datasources/raw.mdx

@@ -50,9 +50,9 @@ build {
 ## External Program Protocol
 
 The protocol is almost the same as the one used by the 
-[json](/docs/datasources/external/json) data source.
+[json](/packer/plugins/datasources/external/json) data source.
 However, query and result are plaintext strings instead
-of JSON objects. Please refer to the [json](/docs/datasources/external/json)
+of JSON objects. Please refer to the [json](/packer/plugins/datasources/external/json)
 for more details.
 
 ## Argument Reference