Bump docker image version used for silabs ci

Author: jmartinez-silabs

.github/workflows/examples-efr32.yaml

@@ -40,7 +40,7 @@ jobs:
     if: github.actor != 'restyled-io[bot]'
 
     container:
-      image: ghcr.io/project-chip/chip-build-efr32:73
+      image: ghcr.io/project-chip/chip-build-efr32:74
       volumes:
         - "/tmp/bloat_reports:/tmp/bloat_reports"
     steps: