Close http clients after using

The crystal http client maintains a keepalive connection to the other
server which stays alive for some time. This should be closed if the
client instance is not used again to avoid hogging resources

src/invidious/users.cr

@@ -427,7 +427,7 @@ def generate_captcha(key, db)
 end
 
 def generate_text_captcha(key, db)
-  response = make_client(TEXTCAPTCHA_URL).get("/omarroth@protonmail.com.json").body
+  response = make_client(TEXTCAPTCHA_URL, &.get("/omarroth@protonmail.com.json").body)
   response = JSON.parse(response)
 
   tokens = response["a"].as_a.map do |answer|