added future work to versioning proposal (thanos-io#3072)

* added future work to versioning proposal

Signed-off-by: thisisobate <[email protected]>

* typo fix and minor edits

Signed-off-by: thisisobate <[email protected]>

* marked status in versioning proposal completed

Signed-off-by: thisisobate <[email protected]>

* typo fixes

Signed-off-by: thisisobate <[email protected]>

Author: thisisobate

docs/proposals/202005_version_documentation.md

@@ -2,7 +2,7 @@
 title: 'Building A Versioning Plugin For Thanos'
 type: proposal
 menu: proposals
-status: approved
+status: complete
 owner: thisisobate
 Date: May 2020
 ---
@@ -86,11 +86,11 @@ We want to add an additional `versioned` folder within the website's `tmp` direc
     |- tmp
         |- public
         |- docs-pre-processed
-        |- versioned
-            |- master
-            |- version 0.13.0
-            |- version 0.12.2
-            |- other-folder-for-other-releases
+            |- versioned
+                |- master
+                |- version 0.13.0
+                |- version 0.12.2
+                |- other-folder-for-other-releases
 ```
 _NOTE: `tmp` directory is not committed, just temporarily built. The current version of docs lives in the `master` folder_
 
@@ -162,3 +162,7 @@ With a regular expression. Instead of the developer manually checking out the in
 ## Summary
 
 We understand [Cortex](https://github.com/cortexproject/cortex/pull/2349) is working on this as well so we are learning from their approach and knowledge.
+
+## Future Work
+
+We hope to rewrite the versioning plugin using Golang. We care a lot about code maintainability and because we use Golang as our primary programming language, it will be easier for developers to contribute to this plugin and make it even better.