Fix broken openapi specs due to change in default branch name

• Fix broken openapi specs due to change in default branch name

requested review from @cguindon, @malowe, @epoirier, @zacharysabourin, and @oliviergoulet

Deploy Preview for webdev.eclipse.org-spec-host is ready [ 1 min 46 sec]

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Test locally docker run -it --rm -p 18181:8080 docker.io/eclipsefdn/webdev-eclipse-org-spec-host:mr-11--a9d6ff6-b1 and open to http://localhost:18181

Browse the preview: https://preview-11--webdev-eclipse-org-spec-host.eclipsecontent.org/docs/api

approved this merge request

mentioned in commit ff458bff

merged