chore(deps): bump aws-java-sdk-s3 from 1.12.172 to 1.12.173

Bumps [aws-java-sdk-s3](https://github.com/aws/aws-sdk-java) from 1.12.172 to 1.12.173.
- [Release notes](https://github.com/aws/aws-sdk-java/releases)
- [Changelog](https://github.com/aws/aws-sdk-java/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-java/compare/1.12.172...1.12.173)

---
updated-dependencies:
- dependency-name: com.amazonaws:aws-java-sdk-s3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -129,7 +129,7 @@ allprojects  {
             dependency 'com.github.librepdf:openpdf:1.3.27'
             dependency 'org.mnode.ical4j:ical4j:3.1.3'
             dependency 'org.quartz-scheduler:quartz:2.3.2'
-            dependency 'com.amazonaws:aws-java-sdk-s3:1.12.172'
+            dependency 'com.amazonaws:aws-java-sdk-s3:1.12.173'
             dependency 'org.ehcache:ehcache:3.9.9'
             dependency 'com.github.spullara.mustache.java:compiler:0.9.10'
             dependency 'com.jayway.jsonpath:json-path:2.7.0'