try running psalm with php target 8.4

Author: dmaicher

.github/workflows/qa.yaml

@@ -63,7 +63,7 @@ jobs:
                   dependency-versions: highest
 
             - name: Psalm
-              run: vendor/bin/psalm --no-progress --show-info=false --stats --output-format=github --threads=$(nproc) --shepherd --php-version=8.5
+              run: vendor/bin/psalm --no-progress --show-info=false --stats --output-format=github --threads=$(nproc) --shepherd --php-version=8.4
 
     rector:
         name: Rector