adding versions

Author: dkazanc

.github/workflows/httomo_backends_pypi_publish.yml

@@ -27,9 +27,9 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install setuptools wheel          
-          $CONDA/bin/conda install conda-forge::tomopy
-          $CONDA/bin/conda install httomo::httomolib
-          $CONDA/bin/conda install httomo::httomolibgpu
+          $CONDA/bin/conda install conda-forge::tomopy==1.15
+          $CONDA/bin/conda install httomo::httomolib==2.1
+          $CONDA/bin/conda install httomo::httomolibgpu==2.1
           $CONDA/bin/conda install conda-forge::pyyaml
           $CONDA/bin/conda list
       - name: Generate yaml templates