Bump actions/cache from 2.1.6 to 2.1.7 #51.

src/changes/changes.xml

@@ -39,7 +39,7 @@
         Update actions/checkout from v2.3.3 to v2.4.0 #9, #14, #21, #48.
       </action>
       <action dev="ggregory" type="update" due-to="Dependabot">
-        Bump actions/cache from v2 to v2.1.6, #25, #37.
+        Bump actions/cache from v2 to v2.1.7, #25, #37, #51.
       </action>
       <action dev="ggregory" type="update" due-to="Gary Gregory">
         Bump maven-plugin-plugin from 3.6.0 to 3.6.1, #33.