ci: update github actions and brew shellenv command usage

- fix a typo in the github action name
- update the brew shellenv command to use the homebrew_prefix variable

.github/workflows/ci.yml

@@ -98,7 +98,7 @@ jobs:
             brew install font-noto-nerd-font
           elif [[ $RUNNER_OS == "Linux" ]]; then
             curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh
-            eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+            eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"
             brew doctor
           fi