Change focus to be broader and more descriptive

doc/tutorial/deploying.rst

@@ -1,5 +1,5 @@
-Deploying a Sphinx project online
-=================================
+Appendix: Deploying a Sphinx project online
+===========================================
 
 When you are ready to show your documentation project to the world, there are
 many options available to do so. Since the HTML generated by Sphinx is static,
@@ -73,9 +73,6 @@ and both GitHub and GitLab have an integrated Pages product, the most effective
 way of automatically build your documentation online is to upload your sources
 to either of these Git hosting services.
 
-The rest of this section will focus on GitHub, which is the most popular Git
-hosting service nowadays. It is very similar to GitLab.
-
 .. _Version Control System: https://en.wikipedia.org/wiki/Version_control
 .. _"Docs as Code": https://www.writethedocs.org/guide/docs-as-code/
 .. _Git: https://git-scm.com/