Fix milestones in doc

doc/administration/geo/secondary_proxy/index.md

@@ -8,8 +8,8 @@ type: howto
 # Geo proxying for secondary sites **(PREMIUM SELF)**
 
 > - [Introduced](https://gitlab.com/groups/gitlab-org/-/epics/5914) in GitLab 14.4 [with a flag](../../feature_flags.md) named `geo_secondary_proxy`. Disabled by default.
-> - [Enabled by default for unified URLs](https://gitlab.com/gitlab-org/gitlab/-/issues/325732) in GitLab 14.5.
-> - [Disabled by default for different URLs](https://gitlab.com/gitlab-org/gitlab/-/issues/325732) in GitLab 14.5 [with a flag](../../feature_flags.md) named `geo_secondary_proxy_separate_urls`.
+> - [Enabled by default for unified URLs](https://gitlab.com/gitlab-org/gitlab/-/issues/325732) in GitLab 14.6.
+> - [Disabled by default for different URLs](https://gitlab.com/gitlab-org/gitlab/-/issues/325732) in GitLab 14.6 [with a flag](../../feature_flags.md) named `geo_secondary_proxy_separate_urls`.
 
 FLAG:
 On self-managed GitLab, this feature is only available by default for Geo sites using a unified URL. See below to