MINOR: Fix category in doap_Kafka.rdf
Reviewers: Mickael Maison
<mailing-list rdf:resource="https://kafka.apache.org/contact.html" />
<download-page rdf:resource="https://kafka.apache.org/downloads.html" />
<programming-language>Scala</programming-language>
- <category rdf:resource="https://projects.apache.org/projects.html?category#big-data" />
+ <category rdf:resource="http://projects.apache.org/category/big-data" />
<repository>
<SVNRepository>
<location rdf:resource="https://gitbox.apache.org/repos/asf/kafka.git"/>
