Add build validation page to docs nav

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

src/zensical.toml

@@ -31,6 +31,7 @@ nav = [
       "Modules/Process-PSModule/index.md",
       {"Repository Structure" = "Modules/Process-PSModule/repository-structure.md"},
       {"Module Anatomy" = "Modules/Process-PSModule/module-anatomy.md"},
+      {"Module Build Validation" = "Modules/Process-PSModule/module-build-validation.md"},
       {"Build, Test, Pack, Publish" = "Modules/Process-PSModule/build-test-pack-publish.md"},
       {"Template Quickstart" = "Modules/Process-PSModule/template-quickstart.md"},
       {"Module Bootstrap" = "Modules/Process-PSModule/module-bootstrap.md"},