Fix alignment in conf.yaml

One of the lines in conf.yaml is missing a space and it is driving me
mad.

Author: nik9000

conf.yaml

@@ -11,7 +11,7 @@ repos:
     apm-agent-nodejs:     https://github.com/elastic/apm-agent-nodejs.git
     apm-agent-python:     https://github.com/elastic/apm-agent-python.git
     apm-agent-ruby:       https://github.com/elastic/apm-agent-ruby.git
-    apm-agent-rum-js:    https://github.com/elastic/apm-agent-rum-js.git
+    apm-agent-rum-js:     https://github.com/elastic/apm-agent-rum-js.git
     apm-agent-go:         https://github.com/elastic/apm-agent-go.git
     apm-agent-java:       https://github.com/elastic/apm-agent-java.git
     apm-agent-dotnet:     https://github.com/elastic/apm-agent-dotnet.git