[nrf noup] Update Docker image version

Update Docker image version to 115.

Signed-off-by: Adrian Gielniewski <adrian.gielniewski@nordicsemi.no>

Author: adigie

.github/workflows/examples-nrfconnect.yaml

@@ -46,7 +46,7 @@ jobs:
         if: github.actor != 'restyled-io[bot]'
 
         container:
-            image: ghcr.io/project-chip/chip-build-nrf-platform:112
+            image: ghcr.io/project-chip/chip-build-nrf-platform:115
             volumes:
                 - "/tmp/bloat_reports:/tmp/bloat_reports"