docs: fix connect-src description grammar in config.rs and .env.template (#7866)

.env.template

@@ -463,7 +463,7 @@
 
 ## Allowed connect-src (Know the risks!)
 ## https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/connect-src
-## Allows other domains to URLs which can be loaded using script interfaces like the Forwarded email alias feature
+## Allows other domains for URLs which can be loaded using script interfaces like the Forwarded email alias feature
 ## This adds the configured value to the 'Content-Security-Policy' headers 'connect-src' value.
 ## Multiple values must be separated with a whitespace. And only HTTPS values are allowed.
 ## Example: "https://my-addy-io.domain.tld https://my-simplelogin.domain.tld"

src/config.rs

@@ -772,7 +772,7 @@ make_config! {
         /// Allowed iframe ancestors (Know the risks!) |> Allows other domains to embed the web vault into an iframe, useful for embedding into secure intranets
         allowed_iframe_ancestors: String, true, def,    String::new();
 
-        /// Allowed connect-src (Know the risks!) |> Allows other domains to URLs which can be loaded using script interfaces like the Forwarded email alias feature
+        /// Allowed connect-src (Know the risks!) |> Allows other domains for URLs which can be loaded using script interfaces like the Forwarded email alias feature
         allowed_connect_src:      String, true, def,    String::new();
 
         /// Seconds between login requests |> Number of seconds, on average, between login and 2FA requests from the same IP address before rate limiting kicks in