Merge pull request #3 from mikopp/patch-2

Update README.md

README.md

@@ -410,6 +410,7 @@ For documentation on the latest development code see the [documentation index][d
 * [cratedb](./plugins/outputs/cratedb)
 * [datadog](./plugins/outputs/datadog)
 * [discard](./plugins/outputs/discard)
+* [dynatrace](./plugins/outputs/dynatrace)
 * [elasticsearch](./plugins/outputs/elasticsearch)
 * [exec](./plugins/outputs/exec)
 * [execd](./plugins/outputs/execd)