Fixed dependencies for alpine CI

.builds/alpine.yml

@@ -3,10 +3,11 @@ packages:
   - meson
   - samurai
   - gtk+3.0-dev
+  - tiff-dev
 tasks:
   - build: |
       cd megapixels
       meson build
       ninja -C build
 artifacts:
-  - megapixels/build/megapixels
+  - megapixels/build/megapixels