ci: Repair broken CI from OIIO locking down dependency hashes (#2102)

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

Author: lgritz

.github/workflows/ci.yml

@@ -355,6 +355,7 @@ jobs:
             setenvs: export OSL_CMAKE_FLAGS="-DOSL_BUILD_TESTS=0 -DBUILD_TESTING=OFF -DUSE_QT=0"
                             OPENIMAGEIO_CMAKE_FLAGS="-DUSE_PYTHON=0"
                             CMAKE_BUILD_TYPE=RelWithDebInfo
+                            OpenImageIO_DEPENDENCY_BUILD_ALLOW_UNVERIFIED_TAGS=ON
 
           - desc: icc/C++17 llvm14 py3.9 oiio-main avx2
             nametag: linux-icc