Use angle brackets for stdlib include

trans/transpiler/phases/emit_cpp/module.py

@@ -24,7 +24,7 @@ class ModuleVisitor(BlockVisitor):
                 yield f'auto& {alias.asname or alias.name} = py_{alias.name}::get_all();'
 
     def import_module(self, name: str) -> Iterable[str]:
-        self.includes.append(f'#include "python/{name}.hpp"')
+        self.includes.append(f'#include <python/{name}.hpp>')
         yield ""
 
     def visit_ImportFrom(self, node: ast.ImportFrom) -> Iterable[str]: