Changes

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If you already cloned the repo simply upgrade by checking out a version tag like so:
 
If you already cloned the repo simply upgrade by checking out a version tag like so:
 
<source lang="bash">
 
<source lang="bash">
$ git checkout -b 13.0 --depth 1
+
$ git checkout 13.0
 +
$ git pull origin 13.0
 
</source>
 
</source>