gh-141674: Docs: Add 'Python' to the <title> of the landing page (#141868)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Co-authored-by: Stan Ulbrych <stan@python.org>

Doc/conf.py

@@ -319,7 +319,7 @@ if any('htmlhelp' in arg for arg in sys.argv):
     print("It may be removed in the future\n")
 
 # Short title used e.g. for <title> HTML tags.
-html_short_title = f'{release} Documentation'
+html_short_title = f'{release} documentation'
 
 # Deployment preview information
 # (See .readthedocs.yml and https://docs.readthedocs.io/en/stable/reference/environment-variables.html)

Doc/tools/templates/indexcontent.html

@@ -1,6 +1,6 @@
 {% extends "layout.html" %}
 {%- block htmltitle -%}
-<title>{{ shorttitle }}</title>
+<title>Python {{ release }} documentation</title>
 {%- endblock -%}
 {%- block extrahead -%}
     {{ super() }}