fix: update copyright year in Java license header replacement template (#1810) (#2138)

Source-Link: googleapis/synthtool@38ad636
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:9b797d0136b7df5846833e1875e8516747ce436cc9406b3bbb17addd78c27aec

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,4 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:ad9cabee4c022f1aab04a71332369e0c23841062124818a4490f73337f790337
+  digest: sha256:9b797d0136b7df5846833e1875e8516747ce436cc9406b3bbb17addd78c27aec
+# created: 2023-06-07T16:08:36.68171314Z