Bump ubuntu in /examples/deployment/kubernetes/mysql/image (#3461)

Bumps ubuntu from `1b8d8ff` to `6d7b5d3`.

---
updated-dependencies:
- dependency-name: ubuntu
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/deployment/kubernetes/mysql/image/Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM ubuntu:jammy@sha256:1b8d8ff4777f36f19bfe73ee4df61e3a0b789caeff29caa019539ec7c9a57f95
+FROM ubuntu:jammy@sha256:6d7b5d3317a71adb5e175640150e44b8b9a9401a7dd394f44840626aff9fa94d
 
 # Patch the OS-level packages and remove unneeded dependencies.
 RUN apt-get update \