alot of "@charset" after updating to Angular 13

[neo-xy]

Which @angular/* package(s) are the source of the bug?

Don't known / other

Is this a regression?

No

Description

Getting alot of warnings like this while running ng serve:

Warning: > styles.css:236:0: warning: "@charset" must be the first rule in the file
236 │ @charset "UTF-8";
╵ ~~~~~~~~
styles.css:235:3486: note: This rule cannot come before a "@charset" rule
235 │ ...a-aos]{transition-duration:.55s}[data-aos][data-aos][data-aos-de...
╵

• I have <meta charset="utf-8"> in my index.html
  and I tryed putting @charset "UTF-8"; in my styles.css as well, did not help

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in

Angular CLI: 13.0.1
Node: 16.10.0
Package Manager: npm 7.24.0
OS: darwin x64

Angular: 13.0.0
... animations, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1300.1
@angular-devkit/build-angular   13.0.1
@angular-devkit/core            13.0.1
@angular-devkit/schematics      13.0.1
@angular/cdk                    12.2.12
@angular/cli                    13.0.1
@angular/fire                   7.1.1
@angular/google-maps            12.2.12
@schematics/angular             13.0.1
rxjs                            7.4.0
typescript                      4.4.4

Anything else?

No response

[JoostK]

Duplicate of #22097.

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