refactor: fix lint error

[ytjmt]

This PR fixes CI failure in Run pnpm lint:

Run pnpm lint

> h3@1.5.0 lint /home/runner/work/h3/h3
> eslint --cache --ext .ts,.js,.mjs,.cjs . && prettier -c src test playground

Checking formatting...
[warn] src/utils/session.ts
[warn] Code style issues found in the above file. Forgot to run Prettier?
 ELIFECYCLE  Command failed with exit code 1.
Error: Process completed with exit code 1.

[codecov]

Codecov Report

Merging #342 (0e97eca) into main (abe7ddb) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #342      +/-   ##
==========================================
- Coverage   74.66%   74.57%   -0.10%     
==========================================
  Files          26       26              
  Lines        2333     2336       +3     
  Branches      367      367              
==========================================
  Hits         1742     1742              
- Misses        591      594       +3     

Impacted Files	Coverage Δ
src/utils/session.ts	21.65% <0.00%> (-0.31%)	⬇️

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