build: update angular shared dev-infra code to 4b4f4e4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@angular/dev-infra-private	devDependencies	digest	94108cd -> 4b4f4e4
angular/dev-infra	action	digest	8a7e038 -> 6354728

🔡 If you wish to disable git hash updates, add ":disableDigestUpdates" to the extends array in your config.

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[andrewseguin]

Conflicts with 13.3.x =P

[devversion]

Updated! Feel free at this point to always change the label until we branch v14 off

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