Update how-to-deploy-blob.md with less ad/spam filled website

The previous website for generating random Base64 strings was cluttered with ads and felt spammy. I've replaced the link with a cleaner, ad-free alternative that offers the same functionality.

Author: rodyvansambeek

articles/iot-edge/how-to-deploy-blob.md

@@ -85,7 +85,7 @@ A deployment manifest is a JSON document that describes which modules to deploy,
 
    - Replace `<local storage account name>` with a name that you can remember. Account names should be 3 to 24 characters long, with lowercase letters and numbers. No spaces.
 
-   - Replace `<local storage account key>` with a 64-byte base64 key. You can generate a key with tools like [GeneratePlus](https://generate.plus/en/base64). You use these credentials to access the blob storage from other modules.
+   - Replace `<local storage account key>` with a 64-byte base64 key. You can generate a key with tools like [Base64 Generator](https://real-generator.com/base64). You use these credentials to access the blob storage from other modules.
 
    - Replace `<mount>` according to your container operating system. Provide the name of a [volume](https://docs.docker.com/storage/volumes/) or the absolute path to an existing directory on your IoT Edge device where the blob module stores its data. The storage mount maps a location on your device that you provide to a set location in the module.
 
@@ -205,7 +205,7 @@ Azure IoT Edge provides templates in Visual Studio Code to help you develop edge
 
 1. Replace `<local storage account name>` with a name that you can remember. Account names should be 3 to 24 characters long, with lowercase letters and numbers. No spaces.
 
-1. Replace `<local storage account key>` with a 64-byte base64 key. You can generate a key with tools like [GeneratePlus](https://generate.plus/en/base64). You use these credentials to access the blob storage from other modules.
+1. Replace `<local storage account key>` with a 64-byte base64 key. You can generate a key with tools like [Base64 Generator](https://real-generator.com/base64). You use these credentials to access the blob storage from other modules.
 
 1. Replace `<mount>` according to your container operating system. Provide the name of a [volume](https://docs.docker.com/storage/volumes/) or the absolute path to a directory on your IoT Edge device where you want the blob module to store its data. The storage mount maps a location on your device that you provide to a set location in the module.