Mark release_3.40 as outdated and no longer LTR

Author: DelazJ

conf.py

@@ -152,12 +152,12 @@
 html_context = {
     # When a QGIS version reaches end of life, set this to True to show an information
     # message on the top of the page.
-    'outdated': False,
+    'outdated': True,
     # When a new QGIS version is released, set this to False to remove the disclaimer
     # information message on the top of the page.
     'isTesting': False,
     # Whether the version is the current LTR
-    'isLtr': True,
+    'isLtr': False,
 }
 
 # Add custom CSS when a top bar is needed to be shown (for testing or outdated versions)