chore(deps): update angular monorepo to v19.2.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@angular/common (source)	19.2.20 → 19.2.21
@angular/compiler (source)	19.2.20 → 19.2.21
@angular/compiler-cli (source)	19.2.20 → 19.2.21
@angular/core (source)	19.2.20 → 19.2.21
@angular/forms (source)	19.2.20 → 19.2.21

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Release Notes

angular/angular (@​angular/common)

v19.2.21

Compare Source

platform-server

Commit	Type	Description
f3a5bfb949	fix	prevent SSRF bypasses via protocol-relative and backslash URLs

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