Update E0005 to use a label

[pythoneer]

Fixes #35192 as Part of #35233

r? @jonathandturner

[rust-highfive]

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[sophiajt]

Thanks for the PR!

Looking good so far. You'll next need to update the unit test to check for the label. There's a quirk in the unit tester in that it will only tests a label if you add at least one NOTE to the unit test. I talk about it in the blog post in the Extra Credit section.

With the unit test updated, we should be good to go.

[sophiajt]

Looks good!

@bors r+ rollup

[bors]

📌 Commit 4cfdf63 has been approved by jonathandturner