fix(emacs): don't explode if quick-lint-js reports a warning #5852

Job	Run time
macOS x86_64	2m 56s
macOS AArch64	1s
Linux x86_64	5m 2s
Linux ARM	2m 25s
Linux AArch64	3m 12s
Windows x86	12m 56s
Windows x64	13m 47s
Windows ARM	2m 3s
Windows ARM64	2m 3s
Chocolatey package	0s
Scoop package	0s
test on ${{ matrix.os.name }}	0s
MSIX installer	0s
npm package	0s
winget manifests	0s
test Chocolatey package	0s
test npm package on ${{ matrix.os.name }} with ${{ matrix.manager.name }}	0s
	44m 25s

Provide feedback