fix CI workflow (#2691)

* use `runner.debug` as conditional

* remove redundant debug step

Author: Treggats

.github/workflows/build-ci.yml

@@ -54,12 +54,8 @@ jobs:
                     coverage: "xdebug"
                     tools: "composer"
 
-            -   name: "Show PHP version"
-                if: ${{ secrets.DEBUG == 'true' }}
-                run: "php -v && composer -V"
-
             -   name: "Show Docker version"
-                if: ${{ secrets.DEBUG == 'true' }}
+                if: ${{ runner.debug }}
                 run: "docker version && env"
 
             -   name: "Download Composer cache dependencies from cache"