PR-checker - use the -e option when running edge-testnet

Allows more easy view to see what goes wrong in the CI.
Seems we have too much variability in different envs.

.github/workflows/pr-checker.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Shellcheck fw-tools/edge-testnet
         run: |
           shellcheck fw-tools/edge-testnet
-          fw-tools/edge-testnet
+          fw-tools/edge-testnet -e
       - run: shellcheck edge-info/edge-info
       - run: cat /etc/os-release
       - run: edge-info/edge-info