force internal deflate

Signed-off-by: Cary Phillips <cary@ilm.com>

.github/workflows/ci_workflow.yml

@@ -360,6 +360,7 @@ jobs:
                 -DCMAKE_CXX_FLAGS=${{ matrix.cxx-flags }} \
                 -DCMAKE_VERBOSE_MAKEFILE:BOOL='OFF' \
                 -DBUILD_SHARED_LIBS=${{ matrix.build-shared }} \
+n                -DOPENEXR_FORCE_INTERNAL_DEFLATE='ON' \
                 -DOPENEXR_INSTALL_TOOLS='ON' \
                 -DOPENEXR_INSTALL_DOCS='OFF' \
                 -DOPENEXR_RUN_FUZZ_TESTS='OFF'