Stage for v1.13.8.0

Signed-off-by: Larry Gritz <lg@larrygritz.com>

CHANGES.md

@@ -1,9 +1,13 @@
 <!-- SPDX-License-Identifier: CC-BY-4.0 -->
 <!-- Copyright Contributors to the Open Shading Language Project. -->
 
-Release 1.13.8.0 -- 1 Apr? 2024 (compared to 1.13.7.0)
+Release 1.13.8.0 -- 1 Apr 2024 (compared to 1.13.7.0)
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-
+- *fix(batched)*: Codegen bug for compref with varying index for batched shading [#1776](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/1776) (by Alex Wells)
+- *fix*: Calculatenormal needs fliphandedness [#1783](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/1783) (by sfriedmapixar)
+- *fix*: Print closure missing error message at compile time instead of run time.  [#1781](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/1781) (by sfriedmapixar)
+- *int*: Change long-deprecated OIIO macro to new one [#1788](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/1788)
+- *ci*: Fix broken Macos-13 CI [#1780](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/1780)
 
 Release 1.13.7.0 -- 1 Mar 2024 (compared to 1.13.6.1)
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