chore: add non_ascii directory to export-ignore

[keith]

If users don't have locales setup correctly, just having this is the
archive makes the download fail. If the build doesn't otherwise have
non-ascii characters the fact that their locales are incorrect doesn't
matter besides this failure:

ERROR: Skipping '//...': error loading package under directory '': no such package '@@aspect_rules_js+//js': java.io.IOException: Error extracting .../aspect_rules_js+/temp7219254014548800952/rules_js-v2.3.8.tar.gz to .../aspect_rules_js+/temp7219254014548800952: [unix_jni.cc:281] .../aspect_rules_js+/js/private/test/image/non_ascii/empty empty.?? (No such file or directory)

[aspect-workflows]

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e2e/npm_translate_lock_subdir_patch

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e2e/npm_translate_package_lock

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e2e/npm_translate_yarn_lock

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e2e/package_json_module

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e2e/pnpm_workspace

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e2e/pnpm_workspace_rerooted

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e2e/repo_mapping

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e2e/rules_foo

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