DOC: Simplify pandas theme footer (pandas-dev#51536)

Author: AbrhamSayd

doc/_templates/pandas_footer.html

@@ -1,3 +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">OVHcloud</a>.
+    &copy {{footer}} 
 </p>

doc/source/conf.py

@@ -375,11 +375,15 @@
    import os
    os.chdir(r'{os.path.dirname(os.path.dirname(__file__))}')
 """
+footer = f"""{datetime.now().year}
+pandas via <a href="https://numfocus.org">NumFOCUS, Inc.
+</a> Hosted by <a href="https://www.ovhcloud.com">OVHcloud</a>."""
 
 
 html_context = {
     "redirects": dict(moved_api_pages),
     "header": header,
+    "footer": footer
 }
 
 # If false, no module index is generated.