Increase number of worker_connection on Nginx on Forge - nginx

Question

I have a lot of error messages like:
2022/11/21 11:05:36 [alert] 729126#729126: *467625 768 worker_connections are not enough while connecting to upstream, upstream: "fastcgi://unix:/var/run/php/php8.1-fpm.sock:"
I'm trying to increase the number of worker_connections. On Laravel Forge, i can edit the nginx configuration file, but nothing I add is working.
My file:
# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/ [...] /before/*;
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name [...] ;
server_tokens off;
root /home/forge/ [...] /public;
# FORGE SSL (DO NOT REMOVE!)
ssl_certificate /etc/nginx/ssl/ [...] /1550866/server.crt;
ssl_certificate_key /etc/nginx/ssl/ [...] /1550866/server.key;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
ssl_prefer_server_ciphers off;
ssl_dhparam /etc/nginx/dhparams.pem;
add_header X-Frame-Options "SAMEORIGIN";
add_header X-XSS-Protection "1; mode=block";
add_header X-Content-Type-Options "nosniff";
index index.html index.htm index.php;
charset utf-8;
# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/ [...] /server/*;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location = /favicon.ico { access_log off; log_not_found off; }
location = /robots.txt { access_log off; log_not_found off; }
access_log off;
error_log /var/log/nginx/ [...] -error.log error;
error_page 404 /index.php;
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php/php8.1-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
}
location ~ /\.(?!well-known).* {
deny all;
}
}
# FORGE CONFIG (DO NOT REMOVE!)
include forge-conf/ [...] /after/*;
I saw this on Github:
events {
# When you need > 8000 * cpu_cores connections, you start optimizing your OS,
# and this is probably the point at which you hire people who are smarter than
# you, as this is *a lot* of requests. default is 768.
worker_connections 768;
multi_accept on;
}
But the "events" entry is not allowed, so I don't know how to specify the number of worker_connections.
Any ideas?