Normalize category naming for Doma tools in plugin.xml

Author: xterao

src/main/resources/META-INF/plugin.xml

@@ -96,13 +96,13 @@
     <intentionAction>
       <language>JAVA</language>
       <className>org.domaframework.doma.intellij.action.dao.ConvertSqlAnnotationToFileAction</className>
-      <category>Doma Tools</category>
+      <category>Doma tools</category>
       <skipBeforeAfter>true</skipBeforeAfter>
     </intentionAction>
     <intentionAction>
       <language>DomaSql</language>
       <className>org.domaframework.doma.intellij.action.dao.ConvertSqlFileToAnnotationAction</className>
-      <category>Doma Tools</category>
+      <category>Doma tools</category>
       <skipBeforeAfter>true</skipBeforeAfter>
     </intentionAction>
   </extensions>