pyproject.toml: Format according to PDM

.editorconfig

@@ -13,3 +13,7 @@ indent_size = 4
 [*.py]
 indent_style = space
 indent_size = 4
+
+[pyproject.toml]
+indent_style = space
+indent_size = 4

pyproject.toml

@@ -30,10 +30,6 @@ dev = [
 [tool.pdm.scripts]
 serve = "flask -A schilder2000 run --debug"
 
-[build-system]
-requires = ["pdm-backend"]
-build-backend = "pdm.backend"
-
 [tool.pdm.build]
 includes = [
     "schilder2000/**/*.py",
@@ -41,3 +37,7 @@ includes = [
     "schilder2000/static/manifest.json",
     # Referenced files in manifest.json included via pdm_build.py
 ]
+
+[build-system]
+requires = ["pdm-backend"]
+build-backend = "pdm.backend"