[Snyk] Security upgrade express from 4.18.1 to 4.21.2

[piotrkardasz]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• examples/nodejs/node-express/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Regular Expression Denial of Service (ReDoS) SNYK-JS-PATHTOREGEXP-8482416	721

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[reneleonhardt]

@piotrkardasz Can open pull requests be merged and the fork synced with upstream to support debian12 and soon debian13?
Thank you for maintaining this alternative!