Added repository to sources for CI

.builds/alpine.yml

@@ -12,5 +12,7 @@ tasks:
   - test: |
       cd megapixels
       ninja -C build test
+sources:
+  - https://git.sr.ht/~martijnbraam/megapixels
 artifacts:
   - megapixels/build/megapixels

.builds/arch.yml

@@ -11,5 +11,7 @@ tasks:
   - test: |
       cd megapixels
       ninja -C build test
+sources:
+  - https://git.sr.ht/~martijnbraam/megapixels
 artifacts:
   - megapixels/build/megapixels