Update package version to 6.0.4

pkg.info

@@ -1,9 +1,11 @@
 name: assimp
 description: Library that loads various 3D file formats into a shared, in-memory format
-version: 6.0.3
+version: 6.0.4
 revision: 1
 url: https://www.assimp.org/
 license: BSD-3-Clause
+maintainers:
+  - [email protected]
 architecture: any
 type: source
 depends:
@@ -16,4 +18,4 @@ downloads:
   - url: https://github.com/assimp/assimp/archive/refs/tags/v${BPM_PKG_VERSION}.tar.gz
     extract_to: ${BPM_SOURCE}
     extract_strip_components: 1
-    checksum: 9be912589023c7d5a6f2b1db8858b689ce815d5eacf0fea82f869708479b1e51
+    checksum: afa5487efdd285661afa842c85187cd8c541edad92e8d4aa85be4fca7476eccc