Bump com.gitlab.haynes:libsass-maven-plugin from 0.2.29 to 0.3.1

Bumps [com.gitlab.haynes:libsass-maven-plugin](https://gitlab.com/haynes/libsass-maven-plugin) from 0.2.29 to 0.3.1.
- [Release notes](https://gitlab.com/haynes/libsass-maven-plugin/tags)
- [Changelog](https://gitlab.com/haynes/libsass-maven-plugin/blob/main/CHANGELOG.md)
- [Commits](https://gitlab.com/haynes/libsass-maven-plugin/compare/0.2.29...0.3.1)

---
updated-dependencies:
- dependency-name: com.gitlab.haynes:libsass-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -82,7 +82,7 @@
         <maven-war-plugin.version>3.4.0</maven-war-plugin.version>
         <jacoco-maven-plugin>0.8.12</jacoco-maven-plugin>
         <maven-enforcer-plugin.version>3.4.1</maven-enforcer-plugin.version>
-        <libsass-maven-plugin.version>0.2.29</libsass-maven-plugin.version>
+        <libsass-maven-plugin.version>0.3.1</libsass-maven-plugin.version>
 
         <!-- Docker image -->
         <docker.jib-maven-plugin.version>3.4.3</docker.jib-maven-plugin.version>