LDAP: Update ldap config comments with TLS info (#91636)

update ldap config comments with TLS info

conf/ldap.toml

@@ -11,10 +11,11 @@ port = 389
 use_ssl = false
 # If set to true, use LDAP with STARTTLS instead of LDAPS
 start_tls = false
-# The value of an accepted TLS cipher. By default, this value is empty. Example value: ["TLS_AES_256_GCM_SHA384"])
+# The value of an accepted TLS cipher. By default, this value is empty. Example value: ["TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384"])
 # For a complete list of supported ciphers and TLS versions, refer to: https://go.dev/src/crypto/tls/cipher_suites.go
+# Starting with Grafana v11.0 only ciphers with ECDHE support are accepted for TLS 1.2 connections.
 tls_ciphers = []
-# This is the minimum TLS version allowed. By default, this value is empty. Accepted values are: TLS1.1, TLS1.2, TLS1.3.
+# This is the minimum TLS version allowed. By default, this value is empty. Accepted values are: TLS1.1 (only for Grafana v10.4 or older), TLS1.2, TLS1.3.
 min_tls_version = ""
 # set to true if you want to skip ssl cert validation
 ssl_skip_verify = false