fixed substitusions

Author: petesramek

.github/workflows/build.yml

@@ -227,14 +227,14 @@ jobs:
       - run: dotnet tool update -g docfx
       - run: docfx ./docfx/api-reference.json
       - run: |
-          mkdir -p ./docs/${ env.assembly-version }
-          cp -r ./docs/ ./docs/${ env.assembly-version }
+          mkdir -p ./docs/${{ env.assembly-version }}
+          cp -r ./docs/ ./docs/${{ env.assembly-version }}
       - run: |
           git checkout docs
           git config --global user.email "action@github.com"
           git config --global user.name "GitHub Action"
-          git add -- ./docs/${ env.assembly-version }
-          git commit -m'added ./docs/${ env.assembly-version }' -- ./docs/${ env.assembly-version }
+          git add -- ./docs/${{ env.assembly-version }}
+          git commit -m'added ./docs/${{ env.assembly-version }}' -- ./docs/${{ env.assembly-version }}
           git push --force origin docs
       # - name: Upload artifact
       #   uses: actions/upload-pages-artifact@v3