Update GitHub build.

Bump actions/setup-java from v1.4.2 to v1.4.3 #62.
Bump actions/checkout from v2.3.2 to v2.3.4 #65.

Author: garydgregory

src/changes/changes.xml

@@ -46,6 +46,8 @@ The <action> type attribute can be add,update,fix,remove.
       <action                   dev="ggregory" type="update" due-to="Dependabot">Update build actions/setup-java from v1.4.1 to v1.4.2 #60.</action>
       <action                   dev="ggregory" type="update" due-to="Gary Gregory">Update commons.jacoco.version 0.8.5 to 0.8.6 (Fixes Java 15 builds).</action>
       <action                   dev="aherbert" type="fix" due-to="James Gan">Remove duplicated words from javadocs.</action>
+      <action                   dev="ggregory" type="update" due-to="Dependabot">Bump actions/setup-java from v1.4.2 to v1.4.3 #62.</action>
+      <action                   dev="ggregory" type="update" due-to="Dependabot">Bump actions/checkout from v2.3.2 to v2.3.4 #65.</action>      
     </release>
 
     <release version="1.15" date="2020-09-01" description="Feature and fix release.">