Fix typo in maven role

[JonoYang]

I have a package scan of the pom for the package pkg:maven/org.elasticsearch/[email protected]?classifier=sources, and I see in the results that there is a typo in the party's role field:

"parties": [
                {
                    "type": "person",
                    "role": "developper",
                    "name": "Elastic",
                    "email": null,
                    "url": "https://www.elastic.co/"
                }
            ],