Bump org.thymeleaf:thymeleaf from 3.0.11.RELEASE to 3.1.2.RELEASE

Bumps org.thymeleaf:thymeleaf from 3.0.11.RELEASE to 3.1.2.RELEASE.

---
updated-dependencies:
- dependency-name: org.thymeleaf:thymeleaf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -60,7 +60,7 @@
         <hamcrest.version>1.3</hamcrest.version>
         <jsonassert.version>1.5.0</jsonassert.version>
         <json.schema.validation.version>1.14.1</json.schema.validation.version>
-        <version.thymeleaf>3.0.11.RELEASE</version.thymeleaf>
+        <version.thymeleaf>3.1.2.RELEASE</version.thymeleaf>
         <version.plantuml>8059</version.plantuml>
         <version.graphviz>0.17.0</version.graphviz>
         <version.fmt-maven-plugin>2.9</version.fmt-maven-plugin>