Bump microsphere-bom to 0.2.8

Update microsphere-bom.version in microsphere-java-parent/pom.xml from 0.2.7 to 0.2.8 to pick up BOM dependency updates. No other properties were changed.

Author: mercyblitz

microsphere-java-parent/pom.xml

@@ -19,7 +19,7 @@
     <description>Microsphere Java Parent</description>
 
     <properties>
-        <microsphere-bom.version>0.2.7</microsphere-bom.version>
+        <microsphere-bom.version>0.2.8</microsphere-bom.version>
         <spring-framework.version>7.0.8</spring-framework.version>
     </properties>