Correct the comment in Output::getBestDataspace.

Bug: N/A
Change-Id: Ia34db4dd225752054478ca9977d88657cf556a0c
Test: builds
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 78c23da..775e6d5 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -967,7 +967,7 @@
             case ui::Dataspace::BT2020_ITU_HLG:
                 bestDataSpace = ui::Dataspace::DISPLAY_P3;
                 // When there's mixed PQ content and HLG content, we set the HDR
-                // data space to be BT2020_PQ and convert HLG to PQ.
+                // data space to be BT2020_HLG and convert PQ to HLG.
                 if (*outHdrDataSpace == ui::Dataspace::UNKNOWN) {
                     *outHdrDataSpace = ui::Dataspace::BT2020_HLG;
                 }