Add schedule to navbar (#137)

Author: Astraxx04

src/_includes/navbar.njk

@@ -16,6 +16,12 @@
               {"name": "Scholarships", "link": "attend/scholarships"}
             ]
           },
+          {
+            "name": "Schedule",
+            "link": "program/schedule",
+            "hasSubmenu": false,
+            "isExternal": false
+          },
           {
             "name": "CFP",
             "hasSubmenu": true,
@@ -31,6 +37,7 @@
             "name": "Program",
             "hasSubmenu": true,
             "submenu": [
+              {"name": "Schedule", "link": "program/schedule"},
               {"name": "Lightning Talks", "link": "program/lightning-talks"}
             ]
           },