Fix CLA CSI Approvers Email Link

Author: saad-ali

CONTRIBUTING.md

@@ -8,7 +8,7 @@ CSI is under [Apache 2.0](LICENSE) and accepts contributions via GitHub pull req
 
 Before contributing to the Container Storage Interface, contributors MUST sign the CLA available [here](https://github.com/container-storage-interface/spec/blob/master/CCLA.pdf).
 The CLA MAY be signed on behalf of a company, possibly covering multiple contributors, or as an individual (put "Individual" for "Corporation name").
-The completed CLA MUST be mailed to the CSI Approvers [mailing list](container-storage-interface-approvers@googlegroups.com).
+The completed CLA MUST be mailed to the CSI Approvers mailing list: container-storage-interface-approvers@googlegroups.com.
 
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