fix typo

Author: ThierryO

docs/manual-git-rstudio.html

@@ -602,7 +602,7 @@ <h3 id="go-to-your-repo-on-github-to-verify">Go to your repo on GitHub to verify
 <h3 id="store-your-credentials-when-using-https">Store your credentials when using https</h3>
 <ol type="1">
 <li>Click on the <code>more</code> button in the <code>git pane</code> and select <code>shell</code></li>
-<li>Type <code>git config --global credential.helper manager</code></li>
+<li>Type <code>git config --global credential.helper store</code></li>
 <li>Type <code>exit</code> to quit the shell</li>
 <li>The next time <code>git</code> needs your credentials, it will ask them one more time and store them</li>
 </ol>

source/manual-git-rstudio.Rmd

@@ -168,7 +168,7 @@ _TODO Stijn: how to set username and email?_
 ### Store your credentials when using https
 
 1. Click on the `more` button in the `git pane` and select `shell`
-1. Type `git config --global credential.helper manager`
+1. Type `git config --global credential.helper store`
 1. Type `exit` to quit the shell
 1. The next time `git` needs your credentials, it will ask them one more time and store them