Add conformance.md to the website build

conformance.md was in nav, but also in draft_docs, made it not available in build and thus 404.

Fixed by removed it from draft_docs

Signed-off-by: Arthit Suriyawongkul <arthit@gmail.com>

mkdocs.yml

@@ -24,7 +24,7 @@ strict: true
 validation:
   nav:
     omitted_files: info  # allow during development where there are moving parts
-    not_found: info      # allow during development where there are moving parts
+    not_found: warn      # warn if a file is referenced in the nav but not included in the build
     absolute_links: warn
   links:
     not_found: warn
@@ -54,4 +54,3 @@ nav:
 draft_docs: |  # for preview with `mkdocs serve`, but excluded from `mkdocs build`
   omg-preface.md
   iso-foreword.md
-  conformance.md