[nrf noup] Workaround for issue with Matter Docker image.

In the docker image there is a change in the zephyr-env.sh script
that breaks the checkout.
We need to stash the changes and reapply them after the NCS update.
It should be fixed during the next NCS bump in the Matter upstream
repository.

Signed-off-by: Arkadiusz Balys <arkadiusz.balys@nordicsemi.no>

Author: ArekBalysNordic

.github/workflows/examples-nrfconnect.yaml

@@ -43,6 +43,13 @@ jobs:
               uses: ./.github/actions/checkout-submodules-and-bootstrap
               with:
                 platform: nrfconnect
+            # Workaround, in docker image there is a change in the zephyr-env.sh script that breaks the checkout process.
+            # We need to stash the changes and reapply them after the NCS update.
+            # It should be fixed during the next NCS bump in the Matter upstream repository.
+            - name: Pre-update NCS
+              run: |
+                  cd /opt/NordicSemiconductor/nrfconnect/zephyr
+                  git stash
             - name: Update NCS recommended version (workflow_dispatch)
               if: github.event_name == 'workflow_dispatch'
               run: |
@@ -63,6 +70,10 @@ jobs:
                           echo "Using NCS from $(cat config/nrfconnect/.nrfconnect-recommended-revision)"
                       fi
                   fi
+            - name: Post-update NCS
+              run: |
+                  cd /opt/NordicSemiconductor/nrfconnect/zephyr
+                  git stash pop
             - name: Check nRF Connect SDK revision.
               run: scripts/run_in_build_env.sh "python3 scripts/setup/nrfconnect/update_ncs.py --update"
               continue-on-error: true