chore: update lambda-http version to 0.13.0

[jreppnow]

Issue #, if available:

Description of changes:

Updating version of lambda_http to address the issues explained in awslabs/aws-lambda-rust-runtime#852.

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[jreppnow]

@maintainers Thanks for the crate! When executing the tests locally via cargo t、test_adapter_options_from_namespaced_env and test_http_readiness_check are failing, but when executed individually, the seem to pass. Personally, I think it's doubtful that this is caused by this PR (albeit I don't know the scope of all changes to the lambda crate), so I would appreciate some advise!

[bnusunny]

We use cargo nextest run to run each test in a seperate process.

Could you please add a test case in this file to cover this issue?

[jreppnow]

@bnusunny Since this is/was a bug contained in a dependency I personally would not elect to write a test for it here, but I think I can come up with something!