release: neo4rs v0.9.0-rc.4 (#228)

* Set version to 0.9.0-rc.4

* Set version in lockfiles

---------

Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: Paul Horn <paul.horn@neo4j.com>

Author: 3 people

ci/Cargo.lock.min

@@ -1,6 +1,6 @@
 [package]
 name = "neo4rs"
-version = "0.9.0-rc.3"
+version = "0.9.0-rc.4"
 authors = [
     "Neo4j Labs <devrel@neo4j.com>",
     "John Pradeep Vincent <yehohanan7@gmail.com>",