Bump com.opengamma.strata:strata-basics from 2.12.27 to 2.12.28

Bumps com.opengamma.strata:strata-basics from 2.12.27 to 2.12.28.

---
updated-dependencies:
- dependency-name: com.opengamma.strata:strata-basics
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -23,7 +23,7 @@
 
     <guava.version>32.1.1-jre</guava.version>
     <nv-i18n.version>1.29</nv-i18n.version>
-    <strata.version>2.12.27</strata.version>
+    <strata.version>2.12.28</strata.version>
 
     <!-- 2.17+ requires java 11+ -->
     <formatter-maven-plugin.version>2.16.0</formatter-maven-plugin.version>