Bump up browser docker base image

[vmmattila]

Describe the bug
Current Browser docker base image is mcr.microsoft.com/playwright:v1.30.0-focal,
which has node version v16.19.0. Version should be bumbped to get Node 20 version to container.

To Reproduce
Steps to reproduce the behavior:

1. run docker command to see node version on container: sudo docker run -it marketsquare/robotframework-browser:18.5.1 node --version

Expected behavior
node version should be 20

Actual result
node version v16.19.0

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: iOS
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context
building container using version 18.5.1 as base image gives dependency warnings:
#22 2.623 2024-05-28 10:12:53,806 [INFO ] Installing node dependencies...
9369#22 2.950 2024-05-28 10:12:54,132 [INFO ] Installing rfbrowser node dependencies at /home/pwuser/.local/lib/python3.8/site-packages/Browser/wrapper
9370#22 3.231 2024-05-28 10:12:54,413 [INFO ] npm WARN config production Use --omit=dev instead.
9371#22 3.626 2024-05-28 10:12:54,808 [INFO ] npm WARN EBADENGINE Unsupported engine {
9372#22 3.626 2024-05-28 10:12:54,808 [INFO ] npm WARN EBADENGINE package: 'cli-truncate@4.0.0',
9373#22 3.626 2024-05-28 10:12:54,809 [INFO ] npm WARN EBADENGINE required: { node: '>=18' },
9374#22 3.626 2024-05-28 10:12:54,809 [INFO ] npm WARN EBADENGINE current: { node: 'v16.19.0', npm: '8.19.3' }
9375#22 3.626 2024-05-28 10:12:54,809 [INFO ] npm WARN EBADENGINE }
....

[aaltat]

@allcontributors please add @vmmattila for bugs

[allcontributors]

@aaltat

I've put up a pull request to add @vmmattila! 🎉

[aaltat]

Was not fixed, building docker image failed

[aaltat]

Fixed in #3628