Fix typos in OAuth 2.0 Resource Server

Signed-off-by: arianna <arianna.comi03@gmail.com>

Author: c-arianna

docs/modules/ROOT/pages/servlet/oauth2/resource-server/jwt.adoc

@@ -961,7 +961,7 @@ By default, Spring Security will wire the `JwtAuthenticationProvider` with a def
 
 As part of configuring a `JwtAuthenticationConverter`, you can supply a subsidiary converter to go from `Jwt` to a `Collection` of granted authorities.
 
-Let's say that that your authorization server communicates authorities in a custom claim called `authorities`.
+Let's say that your authorization server communicates authorities in a custom claim called `authorities`.
 In that case, you can configure the claim that <<oauth2resourceserver-jwt-architecture-jwtauthenticationconverter,`JwtAuthenticationConverter`>> should inspect, like so:
 
 .Authorities Claim Configuration

docs/modules/ROOT/pages/servlet/oauth2/resource-server/opaque-token.adoc

@@ -755,7 +755,7 @@ public OpaqueTokenIntrospector introspector(RestTemplateBuilder builder, OAuth2R
             .setReadTimeout(Duration.ofSeconds(60))
             .build();
 
-    return SpringOpaqueTokenIntrospector(introspectionUri, rest);
+    return new SpringOpaqueTokenIntrospector(introspectionUri, rest);
 }
 ----