[Misc] website: copyright updated

Use range specifying the start year.

website/hugo.yaml

@@ -75,7 +75,9 @@ params:
     # set taxonomyCloud = [] to hide taxonomy clouds
     taxonomyCloud: ["tags", "categories"]
 
-  copyright: SAP SE or an SAP affiliate company
+  copyright:
+    authors: SAP SE or an SAP affiliate company
+    from_year: 2023
   # privacy_policy = "https://policies.google.com/privacy"
 
   # Menu title if your navbar has a versions selector to access old versions of your site.
@@ -167,4 +169,4 @@ module:
     min: 0.135.0
   imports:
     - path: github.com/google/docsy
-      disable: false
+      disable: false