Update Webrick

[daipom]

Which issue(s) this PR fixes:
Fixes #4060

What this PR does / why we need it:
This PR allows us to use the latest Webrick v1.8.

https://github.com/ruby/webrick/releases

Without this fix, plugins using the latest version of Webrick tries to bundle the Fluentd v1.12.1.

• CI: Support Fluentd after v1.13.3 fluent-plugins-nursery/fluent-plugin-utmpx#6

Docs Changes:
Not needed.

Release Note:
Not needed.

[daipom]

TODO confirm test results.

[daipom]

All Windows tests fail:

"fatal: not enough memory for initialization

The fluentd command fails by

[BUG] transient_heap_block_alloc: failed

[daipom]

All Windows tests fail:

"fatal: not enough memory for initialization

The fluentd command fails by

[BUG] transient_heap_block_alloc: failed

These tests have failed before as well.

In my local Ruby3.1 on Windows 10 Home, all tests in TestFluentdCommand is successful.

[daipom]

I will run all tests in my local Ruby3.2 on Windows 10 Home.

[daipom]

I have confirmed all tests are successful on my local environment.

• Windows 10 Home
• Ruby 3.2

[ashie]

I rerun CI for this PR a few times but always fail on Windows platform & all Ruby versions.
Something might be broken on Windows.

They output suspicious log after finishing test:
https://pipelines.actions.githubusercontent.com/serviceHosts/dcea8a2b-d3f2-46b4-98c3-e49156744027/_apis/pipelines/1/runs/5739/signedlogcontent/4?urlExpires=2023-02-20T01%3A08%3A30.7621547Z&urlSigningMethod=HMACV1&urlSignature=Xwoey9RfUNCHigksWBcJsyVRjp3lxmDW5vDV0zrNbEI%3D

2023-02-20T00:45:27.7627491Z Cleaning up orphan processes
2023-02-20T00:45:27.7899895Z Terminate orphan process: pid (6924) (ruby)
2023-02-20T00:45:27.7954214Z Terminate orphan process: pid (6860) (ruby)
2023-02-20T00:45:27.8164435Z Terminate orphan process: pid (6100) (ruby)
2023-02-20T00:45:27.8222072Z Terminate orphan process: pid (6900) (ruby)
2023-02-20T00:45:27.8478316Z Terminate orphan process: pid (2844) (ruby)
2023-02-20T00:45:27.8526378Z Terminate orphan process: pid (6892) (ruby)
2023-02-20T00:45:27.8573093Z Terminate orphan process: pid (1580) (ruby)
2023-02-20T00:45:27.8785154Z Terminate orphan process: pid (1596) (ruby)
...

[daipom]

Thanks for confirming!
Indeed, it looks like something broken...
I will investigate it.

[daipom]

I'm not sure what was going on, but it looks fine now?

[daipom]

I'm not sure what was happening, but now this seems to be working with no problem.

[ashie]

Thanks!

[daipom]

Thanks for your review!