Fix syntax

Author: tkoskela

.github/workflows/cmake.yml

@@ -81,7 +81,7 @@ jobs:
       run: |
         brew update
         brew install libtiff open-mpi libyaml ccache conan
-        echo "{CMAKE_PREFIX_PATH}={/usr/local/opt/libomp}" >> $GITHUB_ENV
+        echo "CMAKE_PREFIX_PATH=/usr/local/opt/libomp" >> $GITHUB_ENV
 
     - name: Prepare ccache timestamp
       id: ccache_cache_timestamp
@@ -114,7 +114,9 @@ jobs:
     - name: Build
       # Build your program with the given configuration.
       # The Github Actions machines are dual-core so we can build faster using 2 parallel processes
-      run: conan build ${{github.workspace}} -bf ${{github.workspace}}/build 
+      run: |
+        echo ${{env.CMAKE_PREFIX_PATH}}
+        conan build ${{github.workspace}} -bf ${{github.workspace}}/build 
 
     - name: Test
       working-directory: ${{github.workspace}}/build