Update credits

README.md

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 A simple MediaWiki extension for rendering Scratch blocks.
 
 Transforms `<scratchblocks>` tags inside wiki articles into `<pre class="blocks">`
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 included in the page. Inline blocks are rendered with `<sb>` tags, and become
 `<code class="blocks">` tags.
 
+- Maintained by ErnieParke ([@Choco31415](https://github.com/Choco31415)).
+- Authored by tjvr
+
 
 Installation
 ============
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     wfLoadExtension( "ScratchBlocks" );
 
 instead of the require statement.
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