fixed external eduGAIN link

you-and-hifis/index.md

@@ -44,7 +44,7 @@ The Helmholtz Cloud will appear as a federated cloud. All services are hosted by
 All services in the Helmholtz Cloud are for free.
 
 #### International Connectivity
-The Helmholtz Cloud is accessible for international users via the Helmholtz AAI. Helmholtz AAI is a member of [eduGAIN](#https://edugain.org/), so if your institution participates in eduGAIN you will be able to authenticate with your home institution credentials. We are also planning to provide social logins, like GitHub or OrcID, in case your institution does not participate in eduGAIN.
+The Helmholtz Cloud is accessible for international users via the Helmholtz AAI. Helmholtz AAI is a member of <a href="https://edugain.org/" target="_blank">eduGAIN</a>, so if your institution participates in eduGAIN you will be able to authenticate with your home institution credentials. We are also planning to provide social logins, like GitHub or OrcID, in case your institution does not participate in eduGAIN.
 ### Software Services
 HIFIS Software Services' mission is to empower scientists of any domain to implement and to
 perpetuate modern scientific software development principles in order to make research software engineering more sustainable.