Update GitHub Pages navigation instructions (#45590)

Co-authored-by: Ben Ahmady <32935794+subatoi@users.noreply.github.com>

Author: ashis-baral

data/reusables/pages/sidebar-pages.md

@@ -1 +1 @@
-1. In the "Code and automation" section of the sidebar, click **{% octicon "browser" aria-hidden="true" aria-label="browser" %} Pages**.
+1. In the{% ifversion fpt or ghec %} "Code, planning, and automation"{% elsif ghes %} "Code and automation"{% endif %} section of the sidebar, click **{% octicon "browser" aria-hidden="true" aria-label="browser" %} Pages**.