Update angular-cli monorepo to v21.2.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@angular/build	21.2.2 → 21.2.3
@angular/cli	21.2.2 → 21.2.3

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Release Notes

angular/angular-cli (@​angular/build)

v21.2.3

Compare Source

@​angular/cli

Commit	Type	Description
1505164bb	fix	use parsed package name for migrate-only updates

@​angular/build

Commit	Type	Description
75fa94cad	fix	alias createRequire banner import to avoid duplicate binding
d009aa1ec	fix	only use external packages for polyfills when no local files are present

@​angular/ssr

Commit	Type	Description
f3e0e82c2	fix	disallow x-forwarded-prefix starting with a backslash
b8bcd59b4	fix	ensure unique values in redirect response Vary header
84385411d	fix	support custom headers in redirect responses

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