Backport boost 4.5.5-beta changes (#46474)

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/20813623657

Upstream-Ref: Automattic/jetpack@90810b4

Author: dilirity

composer.json

@@ -6,10 +6,10 @@
 	"require": {
 		"php": ">=7.2",
 		"automattic/jetpack-admin-ui": "^0.5.11",
-		"automattic/jetpack-connection": "^6.20.0-alpha",
+		"automattic/jetpack-connection": "^6.20.0",
 		"automattic/jetpack-autoloader": "^5.0.15",
 		"automattic/jetpack-config": "^3.1.1",
-		"automattic/jetpack-assets": "^4.3.19-alpha",
+		"automattic/jetpack-assets": "^4.3.19",
 		"automattic/jetpack-redirect": "^3.0.9",
 		"automattic/jetpack-plans": "^0.11.1",
 		"automattic/jetpack-status": "^6.1.2"