Fix outdated MPL licensing

Signed-off-by: Matthew Cong <mcong@nvidia.com>

Author: matthewdcong

openvdb/openvdb/points/PrincipalComponentAnalysis.h

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenVDB Project
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: Apache-2.0
 
 /// @author Richard Jones, Nick Avramoussis
 ///

openvdb/openvdb/points/impl/PointRasterizeEllipsoidsSDFImpl.h

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenVDB Project
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: Apache-2.0
 
 /// @author Richard Jones, Nick Avramoussis
 ///

openvdb/openvdb/points/impl/PrincipalComponentAnalysisImpl.h

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenVDB Project
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: Apache-2.0
 
 #ifndef OPENVDB_POINTS_POINT_PRINCIPAL_COMPONENT_ANALYSIS_IMPL_HAS_BEEN_INCLUDED
 #define OPENVDB_POINTS_POINT_PRINCIPAL_COMPONENT_ANALYSIS_IMPL_HAS_BEEN_INCLUDED

openvdb/openvdb/unittest/TestPCA.cc

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenVDB Project
-// SPDX-License-Identifier: MPL-2.0
+// SPDX-License-Identifier: Apache-2.0
 
 #include <openvdb/openvdb.h>
 #include <openvdb/points/PrincipalComponentAnalysis.h>