[ci] Update caching strategy for Conda packages

Author: dmitry-kabanov

.github/workflows/qa.yaml

@@ -32,12 +32,16 @@ jobs:
               id: get-date
               run: echo "::set-output name=date::$(/bin/date -u "+%Y%m%d")"
 
-            # - name: Cache Conda env
-            #   uses: actions/cache@v3
-            #   with:
-            #       path: ~/conda_pkgs_dir
-            #       key: ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('environment-linux.yaml') }}
-            #   id: cache
+            - name: Cache Conda env
+              uses: actions/cache@v3
+              env:
+                  # Increase this value to reset cache
+                  # if etc/example-environment.yml has not changed.
+                  CACHE_NUMBER: 0
+              with:
+                  path: ~/conda_pkgs_dir
+                  key: ${{ runner.os }}-python-${{ matrix.python-version }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('environment-linux.yaml') }}
+              id: cache
 
             - name: Update environment
               run: |