Update readme.txt

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/39451056241

Upstream-Ref: Automattic/jetpack@64f0329

Author: vianasw

composer.json

@@ -5,12 +5,12 @@
 	"license": "GPL-2.0-or-later",
 	"require": {
 		"php": ">=7.4",
-		"automattic/jetpack-connection": "^9.13.0-alpha",
+		"automattic/jetpack-connection": "^9.13.0",
 		"automattic/jetpack-premium-analytics": "^0.14.0-alpha"
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^4.0.0",
-		"automattic/phpunit-select-config": "^1.0.12-alpha"
+		"automattic/phpunit-select-config": "^1.0.12"
 	},
 	"suggest": {
 		"automattic/jetpack-autoloader": "Allow for better interoperability with other plugins that use this package."