Backport PR #48556 on branch 1.5.x (DOC: Fix docs footer) (#48558)

Backport PR #48556: DOC: Fix docs footer

Co-authored-by: Marc Garcia <garcia.marc@gmail.com>

doc/_templates/pandas_footer.html

@@ -0,0 +1,3 @@
+<p class="copyright">
+    &copy {{copyright}} pandas via <a href="https://numfocus.org">NumFOCUS, Inc.</a> Hosted by <a href="https://www.ovhcloud.com">OVH Cloud</a>.
+</p>

doc/source/conf.py

@@ -163,11 +163,8 @@
 
 # General information about the project.
 project = "pandas"
-copyright = (
-    f"{datetime.now().year} "
-    'pandas via <a href="https://numfocus.org">NumFOCUS, Inc.</a> '
-    'Hosted by <a href="https://www.ovhcloud.com">OVH Cloud</a>'
-)
+# We have our custom "pandas_footer.html" template, using copyright for the current year
+copyright = f"{datetime.now().year}"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -243,6 +240,7 @@
 
 html_theme_options = {
     "external_links": [],
+    "footer_items": ["pandas_footer", "sphinx-version"],
     "github_url": "https://github.com/pandas-dev/pandas",
     "twitter_url": "https://twitter.com/pandas_dev",
     "google_analytics_id": "UA-27880019-2",