Fix typo

(cherry picked from commit 20e89e3)

Author: cbot59

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

@@ -6,7 +6,7 @@
 As described in xref:servlet/oauth2/resource-server/jwt.adoc#oauth2resourceserver-jwt-minimaldependencies[Minimal Dependencies for JWT] most of Resource Server support is collected in `spring-security-oauth2-resource-server`.
 However unless a custom <<oauth2resourceserver-opaque-introspector,`OpaqueTokenIntrospector`>> is provided, the Resource Server will fallback to NimbusOpaqueTokenIntrospector.
 Meaning that both `spring-security-oauth2-resource-server` and `oauth2-oidc-sdk` are necessary in order to have a working minimal Resource Server that supports opaque Bearer Tokens.
-Please refer to `spring-security-oauth2-resource-server` in order to determin the correct version for `oauth2-oidc-sdk`.
+Please refer to `spring-security-oauth2-resource-server` in order to determine the correct version for `oauth2-oidc-sdk`.
 
 [[oauth2resourceserver-opaque-minimalconfiguration]]
 == Minimal Configuration for Introspection