Add SQLite value generation to TOC

Co-authored-by: AndriySvyryd <6539701+AndriySvyryd@users.noreply.github.com>

Author: Copilot

entity-framework/toc.yml

@@ -423,6 +423,8 @@
           href: core/providers/sqlite/limitations.md
         - name: Function mappings
           href: core/providers/sqlite/functions.md
+        - name: Value generation
+          href: core/providers/sqlite/value-generation.md
         - name: Spatial data
           displayName: GIS
           href: core/providers/sqlite/spatial.md