Fix if condition. (#2286)

        SEMANTIC_VERSION: ${{ inputs.semantic_version }}

        DRY_RUN: ${{ inputs.dry_run }}

      run: |

        if [[ git diff-index --quiet HEAD ]]; then

        if git diff-index --quiet HEAD; then

          # The file was actually changed, we need to commit and push the changes

          git commit gradle.properties --message "Upgrade the smithy-rs runtime crates version to ${SEMANTIC_VERSION}"

          echo "Pushing upgraded gradle.properties commit..."