fix: detection of Dockerfile on ftl-build dir

Signed-off-by: LizenzFass78851 <[email protected]>

Author: LizenzFass78851

.github/dependabot.yml

@@ -10,9 +10,9 @@ updates:
     target-branch: master
   # Maintain dependencies for Docker
   - package-ecosystem: "docker"
-    directory: "/"
+    directory: "/ftl-build/"
     schedule:
       interval: "weekly"
       day: saturday
       time: "10:00"
-    target-branch: master
+    target-branch: master