changlogger: When amending, do not preserve default link (#39868)

When doing `changelogger write --amend`, we normally preserve the
prologue, epilogue, and link unless these are overridden on the command
line.

An edge case is when you're amending version 1.2.3-beta to turn it into
1.2.3 release, and the link is the default link like
`https://example.com/diff/1.2.2...1.2.3-beta`. In this situation we
don't want to keep that link, we want to replace it with the new default
`https://example.com/diff/1.2.2...1.2.3`.

Also, when building changelogger, we have to install before trying to run it.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/11487859862

Upstream-Ref: Automattic/jetpack@07e18c2

composer.json

@@ -8,7 +8,7 @@
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^1.1.1",
-		"automattic/jetpack-changelogger": "^4.2.6"
+		"automattic/jetpack-changelogger": "^4.2.7-alpha"
 	},
 	"autoload": {
 		"classmap": [

vendor/automattic/jetpack-device-detection/composer.json

@@ -8,7 +8,7 @@
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^1.1.1",
-		"automattic/jetpack-changelogger": "^4.2.6"
+		"automattic/jetpack-changelogger": "^4.2.7-alpha"
 	},
 	"suggest": {
 		"automattic/jetpack-autoloader": "Allow for better interoperability with other plugins that use this package."

vendor/composer/installed.json

@@ -7,13 +7,13 @@
             "dist": {
                 "type": "path",
                 "url": "/tmp/jetpack-build/Automattic/jetpack-device-detection",
-                "reference": "92b614e873d90f69847bc143c21b8a997e0c0428"
+                "reference": "77353da5f11350060991595061a97d756ddb43e2"
             },
             "require": {
                 "php": ">=7.0"
             },
             "require-dev": {
-                "automattic/jetpack-changelogger": "^4.2.6",
+                "automattic/jetpack-changelogger": "^4.2.7-alpha",
                 "yoast/phpunit-polyfills": "^1.1.1"
             },
             "suggest": {

vendor/composer/installed.php

@@ -13,7 +13,7 @@
         'automattic/jetpack-device-detection' => array(
             'pretty_version' => '2.1.5',
             'version' => '2.1.5.0',
-            'reference' => '92b614e873d90f69847bc143c21b8a997e0c0428',
+            'reference' => '77353da5f11350060991595061a97d756ddb43e2',
             'type' => 'jetpack-library',
             'install_path' => __DIR__ . '/../automattic/jetpack-device-detection',
             'aliases' => array(),