[build_usd] Update OpenImageIO to v2.5.6.0

- The current version v2.3.21.0 includes a bug that reports false
positives when using the `-p` flag and having a very high value
for the absolute tolerance. This is fixed in v2.5.6.0 in
AcademySoftwareFoundation/OpenImageIO#4061.

Author: kohakukun

build_scripts/build_usd.py

@@ -935,6 +935,7 @@ def InstallBoost_Helper(context, force, buildArgs):
             b2_settings.append("--with-date_time")
 
         if context.buildOIIO or context.enableOpenVDB:
+            b2_settings.append("--with-chrono")
             b2_settings.append("--with-system")
             b2_settings.append("--with-thread")
 
@@ -1459,7 +1460,7 @@ def InstallOpenVDB(context, force, buildArgs):
 ############################################################
 # OpenImageIO
 
-OIIO_URL = "https://github.com/OpenImageIO/oiio/archive/refs/tags/v2.3.21.0.zip"
+OIIO_URL = "https://github.com/OpenImageIO/oiio/archive/refs/tags/v2.5.6.0.zip"
 
 def InstallOpenImageIO(context, force, buildArgs):
     with CurrentWorkingDirectory(DownloadURL(OIIO_URL, context, force)):