Bump checkstyle from 8.45.1 to 9.1

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 8.45.1 to 9.1.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-8.45.1...checkstyle-9.1)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -258,7 +258,7 @@ limitations under the License.
     <checkstyle.header.file>${basedir}/src/conf/checkstyle-header.txt</checkstyle.header.file>
     <checkstyle.config.file>${basedir}/src/conf/checkstyle.xml</checkstyle.config.file>
     <commons.checkstyle-plugin.version>3.1.2</commons.checkstyle-plugin.version>
-    <commons.checkstyle.version>8.45.1</commons.checkstyle.version>
+    <commons.checkstyle.version>9.1</commons.checkstyle.version>
     <commons.japicmp.version>0.15.3</commons.japicmp.version>
     <commons.jacoco.version>0.8.7</commons.jacoco.version>
     <commons.javadoc.version>3.3.0</commons.javadoc.version>

src/changes/changes.xml

@@ -51,7 +51,7 @@ The <action> type attribute can be add,update,fix,remove.
       <action issue="CODEC-298" dev="ggregory" type="update" due-to="Arturo Bernal">Use Standard Charset object #82</action> 
       <!-- ADD -->
       <action issue="CODEC-296" dev="mattsicker" type="add" due-to="Matt Sicker">Add support for Blake3 family of hashes.</action>
-      <!-- UDPATE -->
+      <!-- UPDATE -->
       <action                   dev="ggregory" type="update" due-to="Dependabot, Gary Gregory">Bump actions/setup-java from v1.4.1 to v2 #60, #62.</action>
       <action                   dev="ggregory" type="update" due-to="Dependabot">Bump actions/checkout from v2.3.2 to v2.3.4 #65.</action> 
       <action                   dev="ggregory" type="update" due-to="Dependabot">Bump actions/cache from v2 to v2.1.4 #75.</action>
@@ -64,6 +64,7 @@ The <action> type attribute can be add,update,fix,remove.
       <action                   dev="ggregory" type="update" due-to="Gary Gregory">Bump animal-sniffer-maven-plugin from 1.19 to 1.20.</action>
       <action                   dev="ggregory" type="update" due-to="Gary Gregory">Bump maven-pmd-plugin from 3.13.0 to 3.14.0.</action>
       <action                   dev="ggregory" type="update" due-to="Gary Gregory">Bump maven-checkstyle-plugin from 2.17 to 3.1.2.</action>
+      <action                   dev="kinow" type="update" due-to="Dependabot">Bump checkstyle from 8.45.1 to 9.1 #97.</action>
     </release>
 
     <release version="1.15" date="2020-09-01" description="Feature and fix release.">