use correct path

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

.drone.yml

@@ -66,7 +66,7 @@ steps:
       - cd apps/$APP_NAME
 
       # Run phpunit tests
-      - cd tests/php/
+      - cd tests/unit/
       - phpunit --configuration phpunit.xml
 
 trigger:
@@ -96,7 +96,7 @@ steps:
       - cd apps/$APP_NAME
 
       # Run phpunit tests
-      - cd tests/php/
+      - cd tests/unit/
       - phpunit --configuration phpunit.xml
 
 trigger:
@@ -126,7 +126,7 @@ steps:
       - cd apps/$APP_NAME
 
       # Run phpunit tests
-      - cd tests/php/
+      - cd tests/unit/
       - phpunit --configuration phpunit.xml
 
 trigger: