Fix bad link for Nexus OSS
Related to elastic/x-pack-elasticsearch#1301
Original commit: elastic/x-pack-elasticsearch@2273e8ba2449b0f166957401a27cafebd1da0d41
@@ -90,7 +90,7 @@ dependencies {
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--
-If you are using a repository manager such as [Nexus OSS](https://www.sonatype.com/nexus-repository-oss) within your
+If you are using a repository manager such as https://www.sonatype.com/nexus-repository-oss[Nexus OSS] within your
company, you need to add the repository as per the following screenshot:
+
