For those who've built Solana from source, here's how I upgraded.
Ensure your system is up to date
brew upgrade
rustup update
Assuming you've already cloned the Solana GitHub repo, checkout the version you want to install
cd ~/path/to/solana
git pull
git tag -l | sort -V | tail -n 10 # List the latest tags
git checkout v1.1.1 # <--- Replace w/ the desired version of Solana
Extract the code and build the binaries
./scripts/cargo-install-all.sh .
export PATH=$PWD/bin:$PATH
This will install the solana binaries into your solana folder.
To install the Solana binaries system-wide (as if using pre-built binaries):
solana-install init
That should be it!
solana --version