docs: move deprecation notices down the navbar (#13201)

Moved from one of the first items in the navbar down to one of the last. They are not high priority information and should be grouped with upgrade and release notes.

Author: jweissig

website/data/docs-nav-data.json

@@ -11,19 +11,6 @@
   {
     "divider": true
   },
-  {
-    "title": "Feature Deprecation Notice and Plans",
-    "routes": [
-      {
-        "title": "Overview",
-        "path": "deprecation"
-      },
-      {
-        "title": "FAQ",
-        "path": "deprecation/faq"
-      }
-    ]
-  },
   {
     "title": "Browser Support",
     "path": "browser-support"
@@ -1745,7 +1732,22 @@
   {
     "divider": true
   },
-
+  {
+    "title": "Deprecation Notices",
+    "routes": [
+      {
+        "title": "Overview",
+        "path": "deprecation"
+      },
+      {
+        "title": "FAQ",
+        "path": "deprecation/faq"
+      }
+    ]
+  },
+  {
+    "divider": true
+  },
   {
     "title": "Glossary",
     "path": "glossary"