chore(deps): exclude non-existent npm workspace packages from taze

Add @npmcli/docs, @npmcli/mock-globals, and @npmcli/mock-registry
to taze exclusions. These are internal npm CLI workspace packages
that don't exist on the npm registry and caused 404 errors during
dependency update checks.

The vendored npm in node-smol-builder doesn't include these workspace
directories (only docs exists as content), so they cannot be updated
via registry lookups.

Author: jdalton

taze.config.mts

@@ -2,7 +2,15 @@ import { defineConfig } from 'taze'
 
 export default defineConfig({
   // Exclude these packages (migrated from .ncurc.json reject list).
-  exclude: ['eslint-plugin-unicorn', 'terminal-link', 'yargs-parser'],
+  exclude: [
+    'eslint-plugin-unicorn',
+    'terminal-link',
+    'yargs-parser',
+    // Vendored npm workspace packages that don't exist on registry.
+    '@npmcli/docs',
+    '@npmcli/mock-globals',
+    '@npmcli/mock-registry',
+  ],
   // Interactive mode disabled for automation.
   interactive: false,
   // Use minimal logging similar to ncu loglevel.