Bump ubi9/ubi from 9.3-1610 to 9.6 in /p4sdk/images (#409)

Bumps ubi9/ubi from 9.3-1610 to 9.6.

---
updated-dependencies:
- dependency-name: ubi9/ubi
  dependency-version: '9.6'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

p4sdk/images/Dockerfile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # Copyright (c) 2024 Intel Corporation
 
-FROM registry.access.redhat.com/ubi9/ubi:9.3-1610
+FROM registry.access.redhat.com/ubi9/ubi:9.6
 
 ARG P4_NAME
 ENV P4_NAME $P4_NAME