Bump actions/cache from 2.1.4 to 2.1.6 apache#153.

Author: garydgregory

src/changes/changes.xml

@@ -74,7 +74,7 @@
       <action                 type="update" dev="ggregory" due-to="Dependabot, Gary Gregory">Bump build actions/setup-java from v1.4.0 to v2, #101, #113.</action>
       <action                 type="update" dev="ggregory" due-to="Dependabot">Bump maven-pmd-plugin from 3.13.0 to 3.14.0 #122.</action>
       <action                 type="update" dev="ggregory" due-to="Dependabot">Bump mockito-core from 3.5.11 to 3.7.7, #123, #128, #129.</action>
-      <action                 type="update" dev="ggregory" due-to="Dependabot">Bump actions/cache from v2 to v2.1.4 #132.</action>
+      <action                 type="update" dev="ggregory" due-to="Dependabot">Bump actions/cache from v2 to v2.1.6 #132, #153.</action>
       <action                 type="update" dev="ggregory" due-to="Dependabot">Bump maven-checkstyle-plugin from 3.1.1 to 3.1.2 #131.</action>
       <action                 type="update" dev="ggregory" due-to="Dependabot">Bump junit-jupiter from 5.7.0 to 5.7.1 #133.</action>
       <action                 type="update" dev="ggregory" due-to="Dependabot">Bump commons.jacoco.version from 0.8.5 to 0.8.7 (Java 16).</action>