docs(schema): Fix package manager configurations schema title

Signed-off-by: Marcel Bochtler <git@bochtler.io>

integrations/schemas/package-manager-configuration-schema.json

@@ -1,7 +1,7 @@
 {
     "$schema": "http://json-schema.org/draft-07/schema#",
     "$id": "https://oss-review-toolkit.org/package-manager-configuration.yml",
-    "title": "ORT configuration",
+    "title": "ORT package manager configurations",
     "description": "Configurations for package managers for the OSS-Review-Toolkit (ORT). A full list of all available options can be found at https://github.com/oss-review-toolkit/ort/blob/main/model/src/main/kotlin/config/PackageManagerConfiguration.kt.",
     "type": "object",
     "propertyNames": {