Update dependency com.newrelic.agent.java:newrelic-api to v8.20.0

Author: renovate[bot]

pom.xml

@@ -37,7 +37,7 @@
         <testcontainers.version>1.20.4</testcontainers.version>
         <wiremock.version>3.10.0</wiremock.version>
         <lmax-disruptor.version>4.0.0</lmax-disruptor.version>
-        <newrelic.version>8.18.0</newrelic.version>
+        <newrelic.version>8.20.0</newrelic.version>
         <!-- $shasum -a 256 /Users/.../qudini-reactive/qudini-reactive-example/target/newrelic-agent-8.7.0.zip -->
         <newrelic-agent.sha256-checksum>66dc45e62e2891c1a5b5f6b5beb6a75b702e4dee6f930fa827e2355923561bfc</newrelic-agent.sha256-checksum>
         <sentry.version>8.3.0</sentry.version>