use branch for param fetch

.circleci/config.yml

@@ -100,7 +100,7 @@ commands:
           name: Ensure paramcache is installed to project root
           command: |
             test -f ./paramcache \
-              || (rustup run --install nightly cargo install filecoin-proofs --force --git=https://github.com/filecoin-project/rust-fil-proofs.git --branch=master --bin=paramcache --root=./ \
+              || (rustup run --install nightly cargo install filecoin-proofs --force --git=https://github.com/filecoin-project/rust-fil-proofs.git --branch="feat/election-post" --bin=paramcache --root=./ \
                 && mv ./bin/paramcache ./paramcache)
   lint_project:
     steps: