Update Pulsar binder to SCSt 4.1.0-SNAPSHOT (#446)

The Pulsar binder moved from this repo to SCSt repo.
This commit updates to use the new Pulsar binder.

spring-pulsar-docs/spring-pulsar-docs.gradle

@@ -89,7 +89,6 @@ tasks.withType(org.asciidoctor.gradle.jvm.AbstractAsciidoctorTask) {
 				"spring-framework-version": project.springFrameworkVersion ?: 'current',
 				"spring-cloud-stream-version": project.springCloudStreamVersion ?: 'current',
 				"spring-pulsar-version": project.version,
-				"spring-pulsar-binder-version": project.springPulsarBinderVersion ?: 'current',
 				"pulsar-client-version": project.pulsarClientVersion ?: 'current',
 				"pulsar-client-reactive-version": project.pulsarClientReactiveVersion ?: 'current',
 				"is-snapshot-version": project.version.endsWith("-SNAPSHOT")

spring-pulsar-docs/src/main/asciidoc/attributes-variables.adoc

@@ -2,7 +2,6 @@
 :spring-framework-version: current
 :spring-cloud-stream-version: current
 :spring-pulsar-version: current
-:spring-pulsar-binder-version: current
 :pulsar-client-version: current
 :pulsar-client-reactive-version: current
 :is-snapshot-version:  false

spring-pulsar-docs/src/main/asciidoc/pulsar-binder.adoc

@@ -16,9 +16,9 @@ We need to include the following dependency on your application to use Apache Pu
 ----
 <dependencies>
     <dependency>
-        <groupId>org.springframework.pulsar</groupId>
-        <artifactId>spring-pulsar-spring-cloud-stream-binder</artifactId>
-        <version>{spring-pulsar-binder-version}</version>
+        <groupId>org.springframework.cloud</groupId>
+        <artifactId>spring-cloud-stream-binder-pulsar</artifactId>
+        <version>{spring-cloud-stream-version}</version>
     </dependency>
 </dependencies>
 ----
@@ -27,7 +27,7 @@ We need to include the following dependency on your application to use Apache Pu
 .Gradle
 ----
 dependencies {
-    implementation 'org.springframework.pulsar:spring-pulsar-spring-cloud-stream-binder:{spring-pulsar-binder-version}'
+    implementation 'org.springframework.cloud:spring-cloud-stream-binder-pulsar:{spring-cloud-stream-version}'
 }
 ----