put fluxcd.io back

Signed-off-by: Kingdon Barrett <kingdon@weave.works>

docs/spec/v1beta1/imageupdateautomations.md

@@ -691,8 +691,8 @@ spec:
       branch: auto
 ```
 
-[image-auto-guide]: /flux/guides/image-update/#configure-image-update-for-custom-resources
-[git-repo-ref]: /flux/components/source/gitrepositories/#writing-a-gitrepository-spec
+[image-auto-guide]: https://fluxcd.io/flux/guides/image-update/#configure-image-update-for-custom-resources
+[git-repo-ref]: https://fluxcd.io/flux/components/source/gitrepositories/#writing-a-gitrepository-spec
 [durations]: https://godoc.org/time#ParseDuration
-[source-docs]: /flux/components/source/api/v1beta2/#source.toolkit.fluxcd.io/v1beta2.GitRepositorySpec
+[source-docs]: https://fluxcd.io/flux/components/source/api/v1beta2/#source.toolkit.fluxcd.io/v1beta2.GitRepositorySpec
 [go-text-template]: https://golang.org/pkg/text/template/