fix: broken test

[raymondkarstensen]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NationalLibraryOfNorway/ngx-mime/blob/main/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

Does this PR introduce a breaking change?

[ ] Yes
[X] No

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🟥 Failed Commands
nx affected --base=47bb56969f3f070091c303ffe85a3201f0fcc4e2 --head=f2264f06d7fbd8d6d9bdeff57208353201a2a8c9 -t e2e:ci

✅ Successfully ran 4 targets

• nx build --prod --project elements --output-hashing none --single-bundle
• nx build --project=ngx-mime
• nx build
• nx affected --base=47bb56969f3f070091c303ffe85a3201f0fcc4e2 --head=f2264f06d7fbd8d6d9bdeff57208353201a2a8c9 -t lint,test --parallel=4

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