Update Header 1 to match URL and docs section

doc/operations/incident_management/integrations.md

@@ -4,7 +4,7 @@ group: Health
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
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-# Alert integrations **(FREE)**
+# Integrations **(FREE)**
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/13203) in GitLab Ultimate 12.4.
 > - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/42640) to GitLab Free in 12.8.