chore(CI): update system tests (#14431)

update system tests pin version.

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

Author: christophe-papazian

.github/workflows/system-tests.yml

@@ -40,7 +40,7 @@ jobs:
           persist-credentials: false
           repository: 'DataDog/system-tests'
           # Automatically managed, use scripts/update-system-tests-version to update
-          ref: '333b66edb27dfece508f5c6c73730564553f2670'
+          ref: 'fef0bc7c0ba5f74babbb1ac3419291dbd4b65e5e'
 
       - name: Checkout dd-trace-py
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -90,7 +90,7 @@ jobs:
           persist-credentials: false
           repository: 'DataDog/system-tests'
           # Automatically managed, use scripts/update-system-tests-version to update
-          ref: '333b66edb27dfece508f5c6c73730564553f2670'
+          ref: 'fef0bc7c0ba5f74babbb1ac3419291dbd4b65e5e'
 
       - name: Build runner
         uses: ./.github/actions/install_runner
@@ -273,7 +273,7 @@ jobs:
           persist-credentials: false
           repository: 'DataDog/system-tests'
           # Automatically managed, use scripts/update-system-tests-version to update
-          ref: '333b66edb27dfece508f5c6c73730564553f2670'
+          ref: 'fef0bc7c0ba5f74babbb1ac3419291dbd4b65e5e'
       - name: Checkout dd-trace-py
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.gitlab-ci.yml

@@ -14,7 +14,7 @@ variables:
   DD_VPA_TEMPLATE: "vpa-template-cpu-p70-10percent-2x-oom-min-cap"
   # CI_DEBUG_SERVICES: "true"
   # Automatically managed, use scripts/update-system-tests-version to update
-  SYSTEM_TESTS_REF: "333b66edb27dfece508f5c6c73730564553f2670"
+  SYSTEM_TESTS_REF: "fef0bc7c0ba5f74babbb1ac3419291dbd4b65e5e"
 
 default:
   interruptible: true