Build pillow-heif for emscripten-4x

Author: emscripten-forge-bot

recipes/recipes_emscripten/pillow-heif/recipe.yaml

@@ -13,7 +13,7 @@ source:
   - patches/0001-Do-not-include-system-dirs.patch
 
 build:
-  number: 0
+  number: 1
   script: ${{ PYTHON }} -m pip install . ${{ PIP_ARGS }}
 
 requirements:
@@ -55,4 +55,4 @@ about:
 
 extra:
   recipe-maintainers:
-  - emscripten-forge
+  - emscripten-forge