build-unit-test-docker: upgrade CLI11 to 2.3.2

The latest recipe in Yocto is pointing at a much newer release, so
update our Docker container also.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iec7a7135862ff0ac5df9c964cade561543f765ac
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 2b83a99..b204b4b 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -108,7 +108,7 @@
         build_type="cmake",
     ),
     "CLIUtils/CLI11": PackageDef(
-        rev="v1.9.1",
+        rev="v2.3.2",
         build_type="cmake",
         config_flags=[
             "-DBUILD_TESTING=OFF",