ci: Bump developer-tools to latest version

Signed-off-by: Chris Swinchatt <christopher.swinchatt@arm.com>

.gitlab-ci.yml

@@ -22,7 +22,7 @@
 #
 include:
   - project: '${OPEN_IOT_SDK_BASE_GROUP}/tools/developer-tools'
-    ref: 2dca7c7467676667e6fd69b1e0a6840b81a9a7b7
+    ref: 6ae9852bf43cca495842c21d8ebf7a04f8de4e75
     file:
       - '/templates/pipeline-baseline-sdk.yml'
       - '/templates/sync-public/pipeline-sync-public.yml'

developer-tools @ 6ae9852b

-Subproject commit 2dca7c7467676667e6fd69b1e0a6840b81a9a7b7
+Subproject commit 6ae9852bf43cca495842c21d8ebf7a04f8de4e75