fixed typo

Documentation/project-docs/contributing.md

@@ -105,6 +105,6 @@ You must sign a [.NET Foundation Contribution License Agreement (CLA)](http://cl
 
 However, you don't have to do this up-front. You can simply clone, fork, and submit your pull-request as usual.
 
-When your pull-request is created, it is classified by a CLA bot. If the change is trivial, i.e. you just fixed a typo, then the PR is labelled with `cla-not-required`. Otherwise it's classified as `cla-required`. In that case, the system will also also tell you how you can sign the CLA. Once you signed a CLA, the current and all future pull-requests will be labelled as `cla-signed`.
+When your pull-request is created, it is classified by a CLA bot. If the change is trivial, i.e. you just fixed a typo, then the PR is labelled with `cla-not-required`. Otherwise it's classified as `cla-required`. In that case, the system will also tell you how you can sign the CLA. Once you signed a CLA, the current and all future pull-requests will be labelled as `cla-signed`.
 
 Signing the CLA might sound scary but it's actually super simple and can be done in less than a minute.