Fix javadoc issues (#95)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2e2160b..bb47b6d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,4 +25,4 @@
           java-version: 11
 
       - name: Check with Gradle
-        run: ./gradlew check
+        run: ./gradlew check javadoc
diff --git a/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageConsumerBuilder.java b/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageConsumerBuilder.java
index 07b1d22..a63fbcd 100644
--- a/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageConsumerBuilder.java
+++ b/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageConsumerBuilder.java
@@ -585,7 +585,7 @@
 	 * <ul>
 	 * <li>Decreases the throughput of the consumer, by disabling pre-fetching of
 	 * messages. This approach improves the message distribution on shared subscription,
-	 * by pushing messages only to the consumers that are ready to process them./li>
+	 * by pushing messages only to the consumers that are ready to process them.</li>
 	 * <li>Doesn't support batched messages: if the consumer receives any batched message,
 	 * it will close the connection with the broker and
 	 * {@link ReactiveMessageConsumer#consumeOne},
diff --git a/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageSenderBuilder.java b/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageSenderBuilder.java
index 52e9f32..da517f9 100644
--- a/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageSenderBuilder.java
+++ b/pulsar-client-reactive-api/src/main/java/org/apache/pulsar/reactive/client/api/ReactiveMessageSenderBuilder.java
@@ -471,9 +471,10 @@
 	 * compression than ZLib</li>
 	 * <li>{@link CompressionType#ZLIB}: Standard ZLib compression</li>
 	 * <li>{@link CompressionType#ZSTD}: Compress with Zstandard codec. Since Pulsar 2.3.
-	 * Zstd cannot be used if consumer applications are not in version >= 2.3 as well</li>
+	 * Zstd cannot be used if consumer applications are not in version &gt;= 2.3 as
+	 * well</li>
 	 * <li>{@link CompressionType#SNAPPY} Compress with Snappy codec. Since Pulsar 2.4.
-	 * Snappy cannot be used if consumer applications are not in version >= 2.4 as
+	 * Snappy cannot be used if consumer applications are not in version &gt;= 2.4 as
 	 * well</li>
 	 * </ul>
 	 * @param compressionType the compression type to set