Bump actions/cache from 2.1.5 to 2.1.6

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](https://github.com/actions/cache/compare/v2.1.5...v2.1.6)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index d917020..dde1620 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -32,7 +32,7 @@
         
     steps:
     - uses: actions/checkout@v2.3.4
-    - uses: actions/cache@v2.1.5
+    - uses: actions/cache@v2.1.6
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 8387000..f81254f 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -74,7 +74,7 @@
     <action                  type="update" dev="ggregory" due-to="Gary Gregory">Update spotbugs from 4.1.3 to 4.2.3 #175, 189, #209 #218.</action>
     <action                  type="update" dev="ggregory" due-to="Arturo Bernal">Minor Improvements #196..</action>
     <action                  type="update" dev="kinow" due-to="Dependabot">Bump maven-checkstyle-plugin from 3.1.1 to 3.1.2 #202.</action>
-    <action                  type="update" dev="kinow" due-to="Dependabot">Bump actions/cache from v2 to v2.1.5 #205 #217.</action>
+    <action                  type="update" dev="kinow" due-to="Dependabot">Bump actions/cache from v2 to v2.1.6 #205 #217 #234.</action>
     <action                  type="update" dev="ggregory" due-to="Gary Gregory">Update commons-lang3 3.11 -> 3.12.0.</action>
     <action issue="TEXT-194" type="update" dev="kinow" due-to="Arturo Bernal">Use StringUtils.INDEX_NOT_FOUND constant.</action>
     <action issue="TEXT-199" type="update" dev="kinow" due-to="Arturo Bernal">Remove redundant local variable.</action>