[ci] Updated gecko driver log task and ci branches

Author: nemesifier

.github/workflows/ci.yml

@@ -5,14 +5,11 @@ on:
   push:
     branches:
       - master
-      - dev
       - "1.2"
   pull_request:
     branches:
       - master
-      - dev
       - "1.2"
-      - gsoc25-map
 
 jobs:
   build:
@@ -105,7 +102,9 @@ jobs:
 
       - name: Show gecko web driver log on failures
         if: ${{ failure() }}
-        run: cat geckodriver.log
+        run: |
+          [ -f geckodriver.log ] && cat geckodriver.log \
+          || echo "There is no gecko web driver log to show."
 
       - name: Upload Coverage
         if: ${{ success() }}