Update versions.sh to allow for the tests to run

Author: kraftbj

.github/versions.sh

@@ -2,7 +2,7 @@
 PHP_VERSION=8.2
 COMPOSER_VERSION=2.8.3
 NODE_VERSION=22.9.0
-PNPM_VERSION=9.3.0
+PNPM_VERSION=9.15.1
 
 # Other useful version numbers.
 MIN_PHP_VERSION=7.2