chore(mastodon): Reduce SLO requirement to 95%

Given that it's perfectly usable, there is currently no reason
to focus on bringing down response times. Therefore relaxing
the SLO it is for now.

apps/k8s01/mastodon/slo.yaml

@@ -20,7 +20,7 @@ spec:
         annotations:
           summary: "High error rate on 'mastodon' requests responses"
     - name: "requests-latency"
-      objective: 98
+      objective: 95
       description: "Mastodon: SLO based on latency for HTTP request responses. Warns if requests take longer than 250ms. When responses are slower than 200ms they become noticable slow."
       labels:
         category: latency