Upgrade to Redis 6.2.6.

Closes #2272

Makefile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-REDIS_VERSION:=6.0.8
+REDIS_VERSION:=6.2.6
 SPRING_PROFILE?=ci
 SHELL=/bin/bash -euo pipefail
 

ci/openjdk8-redis-6.2/Dockerfile

@@ -4,6 +4,7 @@ FROM ${BASE}
 ARG REDIS
 
 # Copy Spring Data Redis's Makefile into the container
+#
 COPY ./Makefile /
 
 RUN set -eux; \