Update config.yaml

Author: tturocy

config.yaml

@@ -67,8 +67,8 @@ params:
   navbar:
     # - title: Research
     #   url: /research/
-    - title: 🚀 Google Summer of Code 🚀 
-      url: /gsoc_2026/
+    # - title: 🚀 Google Summer of Code 🚀 
+    #   url: /gsoc_2026/
     - title: Install
       url: "https://gambitproject.readthedocs.io/en/stable/install.html"
     - title: Documentation
@@ -77,6 +77,8 @@ params:
       sublinks:
         - title: Team
           url: /team/
+        - title: History
+          url: /history/
         - title: Citing
           url: /cite/
         - title: GitHub