Revert "[Fix_#3569] Temporarily disabling SpecConversion example IT test (apache#1982)" (apache#1990)

This reverts commit ba943f8.

Author: fjtirado

serverless-workflow-examples/serverless-workflow-temperature-conversion/pom.xml

@@ -41,7 +41,7 @@
     <module>conversion-workflow</module>
     <module>conversion-workflow-full</module>
     <module>conversion-workflow-function</module>
-<!--    <module>conversion-workflow-spec</module>-->
+    <module>conversion-workflow-spec</module>
   </modules>
 
 </project>