chore: update hooks

use nvm install, quiet exit in post checkout if nvm is not available

.husky/post-checkout

@@ -1,4 +1,14 @@
 #!/usr/bin/env sh
 . "$(dirname -- "$0")/_/husky.sh"
 
+# Load nvm
+export NVM_DIR="$HOME/.nvm"
+if [ ! -s "$NVM_DIR/nvm.sh" ]; then
+  # nvm not available, quietly exit
+  exit 0
+fi
+. "$NVM_DIR/nvm.sh"
+
+
+nvm install
 pnpm i

.husky/pre-push

@@ -7,7 +7,7 @@ export NVM_DIR="$HOME/.nvm"
 
 
 if [ $(git branch --no-color | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/') = "master" ] && [ $(git remote get-url origin) = "https://github.com/monkeytypegame/monkeytype" ]; then
-  nvm use
+  nvm install
   echo "Running a full check before pushing to master..."
   npm run full-check
   if [ $? -ne 0 ]; then