Add meta tag to prioritize web search of docs over community pages.
Add meta tag to prioritize web search of docs over community pages.

This PR updates the reference to a documentation plugin.
The actual change happens in neo-technology/documentation-gradle-plugins#2

neo4j/neo4j-ogm,neo4j/neo4j-ogm,neo4j/neo4j-ogm,neo4j/neo4j-ogm