Update tools

Author: sebastianbergmann

.phive/phars.xml

@@ -4,5 +4,5 @@
   <phar name="php-cs-fixer" version="^3.53" installed="3.64.0" location="./tools/php-cs-fixer" copy="true"/>
   <phar name="psalm" version="^5.23" installed="5.26.1" location="./tools/psalm" copy="true"/>
   <phar name="humbug/php-scoper" version="^0.18" installed="0.18.15" location="./tools/php-scoper" copy="true"/>
-  <phar name="composer" version="^2.7" installed="2.7.9" location="./tools/composer" copy="true"/>
+  <phar name="composer" version="^2.7" installed="2.8.1" location="./tools/composer" copy="true"/>
 </phive>