ci:Ensure that we are selecting the right fmt version when building OIIO

We were using the wrong env variable name.

Signed-off-by: Larry Gritz <[email protected]>

Author: lgritz

.github/workflows/build-steps.yml

@@ -101,6 +101,7 @@ jobs:
       CTEST_TEST_TIMEOUT: ${{inputs.ctest_test_timeout}}
       USE_SIMD: ${{inputs.simd}}
       FMT_VERSION: ${{inputs.fmt_ver}}
+      fmt_BUILD_VERSION: ${{inputs.fmt_ver}}
       OPENCOLORIO_VERSION: ${{inputs.opencolorio_ver}}
       OPENEXR_VERSION: ${{inputs.openexr_ver}}
       OPENIMAGEIO_VERSION: ${{inputs.openimageio_ver}}

.github/workflows/ci.yml

@@ -436,7 +436,7 @@ jobs:
             cc_compiler: gcc-14
             cxx_compiler: g++-14
             cxx_std: 20
-            fmt_ver: master
+            fmt_ver: 12.0.0
             opencolorio_ver: main
             openexr_ver: main
             openimageio_ver: main