Update neo4j Docker tag to v5.22 (#116)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| neo4j ([changelog](https://neo4j.com/release-notes/)) | service |
minor | `5.21-community` -> `5.22-community` |

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.github/workflows/testing.yml

@@ -25,7 +25,7 @@ jobs:
 
     services:
       neo4j:
-        image: neo4j:5.21-community
+        image: neo4j:5.22-community
         env:
           NEO4J_AUTH: neo4j/password
         ports: