Docs: set title explicitly (#10519)

The current title is "{page title} - Read the Docs user documentation 9.15.0 documentation"

Author: stsewd

docs/conf.py

@@ -42,12 +42,14 @@
         "use_config_file": False,
         "config": {
             "project": "Read the Docs user documentation",
+            "html_title": "Read the Docs user documentation",
         },
     },
     "dev": {
         "use_config_file": False,
         "config": {
             "project": "Read the Docs developer documentation",
+            "html_title": "Read the Docs developer documentation",
         },
     },
 }