Bump actions/checkout from 2 to 3 apache#93

Author: garydgregory

src/changes/changes.xml

@@ -90,7 +90,7 @@
         Bump maven-pmd-plugin from 3.12.0 to 3.16.0, #44, #54, #67, #92.
       </action>
       <action type="update" dev="ggregory" due-to="Dependabot">
-        Bump actions/checkout from v2.3.1 to v2.4.0 #46, #72, #78.
+        Bump actions/checkout from 2.3.1 to 3 #46, #72, #78, #93.
       </action>
       <action type="update" dev="ggregory" due-to="Dependabot, Gary Gregory">
         Bump actions/setup-java from v1.4.2 to v2 #50.