Bump tomcat-embed-core from 9.0.67 to 9.0.68 (#2537)

Bumps tomcat-embed-core from 9.0.67 to 9.0.68.

---
updated-dependencies:
- dependency-name: org.apache.tomcat.embed:tomcat-embed-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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build.gradle

@@ -112,7 +112,7 @@ ext {
 	assertJVersion = '3.23.1'
 	awaitilityVersion = '4.2.0'
 	hoverflyJavaVersion = '0.14.3'
-	tomcatVersion = '9.0.67'
+	tomcatVersion = '9.0.68'
 	boringSslVersion = '2.0.54.Final'
 	junitVersion = '5.9.1'
 	junitPlatformLauncherVersion = '1.9.1'