chore(workflows/website): trigger build if top-level package.json changes

for example because of typedoc

Author: hasezoey

.github/workflows/website.yml

@@ -12,6 +12,7 @@ on:
       - '.github/workflows/website.yml'
       - 'scripts/getDeployInfo.js'
       - 'scripts/ghPagesDeploy.js'
+      - 'package.json' # typedoc may have changed
 
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   contents: read