Update dependency javax.servlet:javax.servlet-api to v4 (hughtest)

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
javax.servlet:javax.servlet-api (source)	3.0.1 -> 4.0.1

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Release Notes

javaee/servlet-spec (javax.servlet:javax.servlet-api)

### [`v4.0.1`](https://togithub.com/javaee/servlet-spec/compare/4.0.0...4.0.1) [Compare Source](https://togithub.com/javaee/servlet-spec/compare/4.0.0...4.0.1) ### [`v4.0.0`](https://togithub.com/javaee/servlet-spec/compare/3.1.0...4.0.0) [Compare Source](https://togithub.com/javaee/servlet-spec/compare/3.1.0...4.0.0) ### [`v3.1.0`](https://togithub.com/javaee/servlet-spec/compare/3.0.1...3.1.0) [Compare Source](https://togithub.com/javaee/servlet-spec/compare/3.0.1...3.1.0)

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