CI: Update cpplint filters

Author: chennes

.github/workflows/sub_lint.yml

@@ -83,18 +83,19 @@ on:
           -build/endif_comment,
           +build/explicit_make_pair,
           -build/forward_decl,
-          +build/header_guard,
+          -build/header_guard,
           +build/include,
           -build/include_subdir,
           -build/include_alpha,
           -build/include_order,
           +build/include_what_you_use,
           +build/namespaces_headers,
           +build/namespaces_literals,
-          +build/namespaces,
+          -build/namespaces,
           +build/printf_format,
           +build/storage_class,
           +readability/alt_tokens,
+          -legal/copyright,
           -readability/braces,
           +readability/casting,
           +readability/check,