Change the Packet.net section to be more consistent with the other *C…

…loud Guide pages. (ansible#50170)

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+label: docsite_pr

docs/docsite/rst/scenario_guides/guide_packet.rst

@@ -1,5 +1,5 @@
 **********************************
-Using Ansible with the Packet host
+Packet.net Guide
 **********************************
 
 Introduction