Add retry logic for foundryup

[elopez]

          thanks @mds1 that's a good point 
          
          Looking at the error message, it might also be https://github.com/foundry-rs/foundry/issues/3942 (which would explain why the tests are passing in @pcaversaccio CI).

          @elopez : maybe we can update the commit used for foundryup, and if installing foundry fails, we do a `sleep` for 1-2 second, and try again?

Originally posted by @montyly in #66 (comment)