add open3d dep in correct alphabetical location

requirements.txt

@@ -7,9 +7,9 @@ bosdyn-mission==4.0.2
 grpcio==1.59.3
 image==1.5.33
 inflection==0.5.1
+open3d==0.18.0 
 protobuf==4.22.1
 pytest==7.3.1
 pytest-cov==4.1.0
 pytest-xdist==3.5.0
 setuptools==59.6.0
-open3d==0.18.0