[5.3] phpstan-baseline.neon should not be distributed (joomla#45730)

Exclude the file `phpstan-baseline.neon` from the packages to be built.

Author: heelc29

build/build.php

@@ -453,8 +453,9 @@ function capture_or_fail(string $command): string
     'cypress.config.dist.mjs',
     'package-lock.json',
     'package.json',
-    'phpunit-pgsql.xml.dist',
+    'phpstan-baseline.neon',
     'phpstan.neon',
+    'phpunit-pgsql.xml.dist',
     'phpunit.xml.dist',
     'plugins/sampledata/testing/language/en-GB/en-GB.plg_sampledata_testing.ini',
     'plugins/sampledata/testing/language/en-GB/en-GB.plg_sampledata_testing.sys.ini',