Run install from conda Github Action test also with Python 3.14 (#4569)

Author: valeriupredoi

.github/workflows/install-from-conda.yml

@@ -29,6 +29,7 @@ jobs:
         python-version:
           - "3.12"
           - "3.13"
+          - "3.14"
     name: Install esmvaltool-python with Python ${{ matrix.python-version }} on ${{ matrix.os }}
     steps:
       - uses: mamba-org/setup-micromamba@d7c9bd84e824b79d2af72a2d4196c7f4300d3476  # v3.0.0