Update amazon/dynamodb-local Docker tag to v1.22.0 (#138)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

dynamo.Dockerfile

@@ -1,5 +1,5 @@
 ARG DB_LOCATION=/home/dynamodblocal/db
-FROM amazon/dynamodb-local:1.12.0 AS install
+FROM amazon/dynamodb-local:1.22.0 AS install
 
 USER root
 RUN yum -y install awscli
@@ -20,7 +20,7 @@ RUN mkdir -p ${DB_LOCATION} && \
       --endpoint-url ${AWS_ENDPOINT} --region ${AWS_REGION} && \
       kill $DYNAMO_PID
 
-FROM amazon/dynamodb-local:1.12.0
+FROM amazon/dynamodb-local:1.22.0
 
 ARG DB_LOCATION
 COPY --chown=dynamodblocal:dynamodblocal --from=install ${DB_LOCATION} /db