add rustfmt formatter

Author: Prabhat1308

Diff for: .github/workflows/prod.yml

@@ -25,6 +25,8 @@ jobs:
           - run: rustup toolchain install ${{ matrix.rust }} && rustup default ${{ matrix.rust }} && rustup update ${{ matrix.rust }}
           - name: Install Clippy
             run: rustup component add clippy
+          - name: Install Rustfmt
+            run: rustup component add rustfmt
           - name: Build
             run: cargo build --release --verbose --features arkworks
           - name: Test