Request usage guide update on named policy changes

Author: Mark-Simulacrum

tls/s2n_security_policies.c

@@ -1242,6 +1242,7 @@ const struct s2n_security_policy security_policy_null = {
 };
 
 struct s2n_security_policy_selection security_policy_selection[] = {
+    /* If changing named policies, please update the usage guide's docs on the corresponding policy. */
     { .version = "default", .security_policy = &security_policy_20240501, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
     { .version = "default_tls13", .security_policy = &security_policy_20240503, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
     { .version = "default_fips", .security_policy = &security_policy_20240502, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
@@ -1357,6 +1358,7 @@ struct s2n_security_policy_selection security_policy_selection[] = {
     { .version = "20250211", .security_policy = &security_policy_20250211, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
     { .version = "20250414", .security_policy = &security_policy_20250414, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
     { .version = "20250429", .security_policy = &security_policy_20250429, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
+    /* If changing this, please update the usage guide's docs on the corresponding policy. */
     { .version = "rfc9151", .security_policy = &security_policy_20250429, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
     { .version = "test_all", .security_policy = &security_policy_test_all, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },
     { .version = "test_all_fips", .security_policy = &security_policy_test_all_fips, .ecc_extension_required = 0, .pq_kem_extension_required = 0 },