Fix release.sh for npm 7

scripts/release/release.sh

@@ -42,8 +42,10 @@ publish() {
   npm publish --tag "$dist_tag" --otp "$(prompt_otp)"
 
   log "Publishing @openzeppelin/contracts on npm"
+  cd contracts
   env ALREADY_COMPILED= \
-      npm publish contracts --tag "$dist_tag" --otp "$(prompt_otp)"
+      npm publish --tag "$dist_tag" --otp "$(prompt_otp)"
+  cd ..
 
   if [[ "$dist_tag" == "latest" ]]; then
     otp="$(prompt_otp)"