Bad links in all.jsonnet

[aletessier]

Links in example are broken. For example here:

kube-thanos/all.jsonnet

Line 113 in add27c3

// For DNS service discovery reference https://thanos.io/service-discovery.md/#dns-service-discovery

should be https://thanos.io/tip/thanos/service-discovery.md/#dns-service-discovery

[kakkoyun]

Thanks for reporting :) Feel free to contribute 🤗

[yeya24]

Closed by #250