Javadoc fixes for README and Samples (Azure#33799)

Author: ibrahimrabab

sdk/storage/azure-storage-blob/README.md

@@ -180,12 +180,18 @@ The following sections provide several code snippets covering some of the most c
 - [Upload data to a blob](#upload-data-to-a-blob)
 - [Upload a blob from a stream](#upload-a-blob-from-a-stream)
 - [Upload a blob from local path](#upload-a-blob-from-local-path)
+- [Upload a blob if one does not already exist](#upload-a-blob-if-one-does-not-already-exist)
+- [Upload a blob and overwrite if one already exists](#upload-a-blob-and-overwrite-if-one-already-exists)
+- [Upload a blob via an `OutputStream`](#upload-a-blob-via-an-outputstream)
 - [Download data from a blob](#download-data-from-a-blob)
 - [Download a blob to a stream](#download-a-blob-to-a-stream)
 - [Download a blob to local path](#download-a-blob-to-local-path)
+- [Read a blob via an `InputStream`](#read-a-blob-via-an-inputstream)
 - [Enumerate blobs](#enumerate-blobs)
 - [Copy a blob](#copy-a-blob)
+- [Generate a SAS token](#generate-a-sas-token)
 - [Authenticate with Azure Identity](#authenticate-with-azure-identity)
+- [Set a proxy when building a client](#set-a-proxy-when-building-a-client)
 
 ### Create a `BlobServiceClient`
 

sdk/storage/azure-storage-file-share/src/samples/java/com/azure/storage/file/share/ReadmeSamples.java

@@ -220,7 +220,7 @@ public void uploadDataToStorageBiggerThan4MB() {
         // BEGIN: readme-sample-uploadDataToStorageBiggerThan4MB
         byte[] data = "Hello, data sample!".getBytes(StandardCharsets.UTF_8);
 
-        long chunkSize = ShareFileAsyncClient.FILE_DEFAULT_BLOCK_SIZE;
+        long chunkSize = 4 * 1024 * 1024L;
         if (data.length > chunkSize) {
             for (int offset = 0; offset < data.length; offset += chunkSize) {
                 try {