Bump maven-failsafe-plugin from 3.0.0-M5 to 3.0.0-M6 in /fhir-parent

Bumps [maven-failsafe-plugin](https://github.com/apache/maven-surefire) from 3.0.0-M5 to 3.0.0-M6.
- [Release notes](https://github.com/apache/maven-surefire/releases)
- [Commits](apache/maven-surefire@surefire-3.0.0-M5...surefire-3.0.0-M6)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-failsafe-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

fhir-parent/pom.xml

@@ -800,7 +800,7 @@
                 </plugin>
                 <plugin>
                     <artifactId>maven-failsafe-plugin</artifactId>
-                    <version>3.0.0-M5</version>
+                    <version>3.0.0-M6</version>
                 </plugin>
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>