Fix typos and formatting in documentation

Closes gh-15353

Author: Seungpang

docs/modules/ROOT/pages/servlet/authorization/method-security.adoc

@@ -239,7 +239,7 @@ static RoleHierarchy roleHierarchy() {
 
 Kotlin::
 +
-[source,java,role="secondary"]
+[source,kotlin,role="secondary"]
 ----
 companion object {
     @Bean

docs/modules/ROOT/pages/servlet/saml2/login/authentication-requests.adoc

@@ -87,7 +87,7 @@ RelyingPartyRegistration relyingPartyRegistration = RelyingPartyRegistration.wit
 
 Kotlin::
 +
-[source,java,role="secondary"]
+[source,kotlin,role="secondary"]
 ----
 var relyingPartyRegistration: RelyingPartyRegistration =
     RelyingPartyRegistration.withRegistrationId("okta")
@@ -96,7 +96,7 @@ var relyingPartyRegistration: RelyingPartyRegistration =
                 // ...
                 .wantAuthnRequestsSigned(false)
         }
-        .build();
+        .build()
 ----
 ======
 
@@ -141,7 +141,7 @@ var relyingPartyRegistration: RelyingPartyRegistration =
                     )
                 }
         }
-        .build();
+        .build()
 ----
 ======
 

docs/modules/ROOT/pages/servlet/saml2/login/overview.adoc

@@ -949,12 +949,12 @@ Collection<RelyingPartyRegistration> registrations = RelyingPartyRegistrations
             .entityId("https://example.org/saml2/sp")
             .build()
         )
-        .collect(Collectors.toList()));
+        .collect(Collectors.toList());
 ----
 
 Kotlin::
 +
-[source,java,role="secondary"]
+[source,kotlin,role="secondary"]
 ----
 var registrations: Collection<RelyingPartyRegistration> = RelyingPartyRegistrations
         .collectionFromMetadataLocation("https://example.org/saml2/idp/metadata.xml")
@@ -964,7 +964,7 @@ var registrations: Collection<RelyingPartyRegistration> = RelyingPartyRegistrati
             .assertionConsumerServiceLocation("{baseUrl}/login/saml2/sso")
             .build()
         }
-        .collect(Collectors.toList()));
+        .collect(Collectors.toList())
 ----
 ======