Revise download instructions for EasyFiji plugin

Updated installation instructions for EasyFiji plugin.

Author: chenli-git

_pages/plugins/EasyFiji_plugin.md

@@ -23,13 +23,10 @@ please check [Github link](https://github.com/chenli-git/FijiGui) for relevant i
    1. Launch Fiji and navigate to Help > Update.. in the menu bar.
    2. In the updater window, click Manage Update sites and Search for "EasyFiji" and click "Apply and Close". 
    3. Restart Fiji.
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 * Download via Github:
    1. [Click here to download ⬇️](https://github.com/chenli-git/FijiGui/raw/main/target/EasyFiji_2-1.2.0.jar)
    2. After downloading, copy the `.jar` file into your **Fiji.app/plugins/** folder. 
    3. Restart Fiji.
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 ## Quick start
 * [Tutorial video](https://www.youtube.com/watch?v=MzzeFybe4ZY)