Fix sphinx config language (#51)

.github/actions/install-main-dependencies/action.yml

@@ -45,7 +45,7 @@ runs:
         key: aer-cache-${{ inputs.os }}-${{ inputs.python-version }}-${{ env.AER_HASH }}-${{ env.CACHE_VERSION }}
     - name: Install Terra from Main
       env:
-        MACOSX_DEPLOYMENT_TARGET: 10.9
+        MACOSX_DEPLOYMENT_TARGET: 10.15
       run: |
         echo 'Install Terra from Main'
         BASE_DIR=terra-cache
@@ -119,6 +119,9 @@ runs:
           pushd /tmp/qiskit-aer
           if [ "${{ inputs.os }}" == "windows-2019" ]; then
             python setup.py bdist_wheel -- -G 'Visual Studio 16 2019'
+          elif  [ "${{ inputs.os }}" == "macos-latest" ]; then
+            pip install -U -c constraints.txt -r requirements-dev.txt
+            python setup.py bdist_wheel --plat-name macosx-10.16-x86_64
           else
             python setup.py bdist_wheel
           fi

docs/conf.py

@@ -1,6 +1,6 @@
 # This code is part of Qiskit.
 #
-# (C) Copyright IBM 2021.
+# (C) Copyright IBM 2021, 2022.
 #
 # This code is licensed under the Apache License, Version 2.0. You may
 # obtain a copy of this license in the LICENSE.txt file in the root directory
@@ -60,7 +60,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.