web proxy: add explicit !LOW to previous

src/opnsense/service/templates/OPNsense/Proxy/squid.conf

@@ -51,7 +51,7 @@
 sslcrtd_program /usr/local/libexec/squid/ssl_crtd -s /var/squid/ssl_crtd -M {{ OPNsense.proxy.forward.ssl_crtd_storage_max_size|default('4') }}MB
 sslcrtd_children {{ OPNsense.proxy.forward.sslcrtd_children|default('5') }}
 
-sslproxy_cipher HIGH:MEDIUM:!RC4:!aNULL:!eNULL:!3DES:!MD5:!EXP
+sslproxy_cipher HIGH:MEDIUM:!RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP
 
 # setup ssl bump acl's
 acl bump_step1 at_step SslBump1