PS-10259 [DOCS] - Change JS Lang feature to Tech Preview 8.4

    On branch ps-10259-8.4
	modified:   docs/js-lang-overview.md
	modified:   docs/js-lang-privileges.md
	modified:   docs/js-lang-procedures.md
	modified:   docs/js-lang-troubleshoot.md

Author: patrickbirch

docs/js-lang-overview.md

@@ -1,6 +1,6 @@
 # JS stored procedure and function overview
 
---8<--- "experimental.md"
+--8<--- "tech.preview.md:5:5"
 
 Integrating stored procedures and functions in JS within a MySQL-compatible database provides a versatile and practical approach to managing complex data processing tasks. This method significantly enhances performance, allowing developers to execute intricate operations more efficiently. For those proficient in JS, this approach streamlines the development process, reducing the load on client applications and optimizing overall system performance. By employing stored procedures and functions, developers achieve faster data processing and facilitate more manageable maintenance and scalability, making it an ideal solution for those skilled in JS.
 

docs/js-lang-privileges.md

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 # JS privileges
 
---8<--- "experimental.md"
+--8<--- "tech.preview.md:5:5"
 
 Privileges control what users can do. You use them to give specific permissions to different users. This ability helps you keep your data secure by only allowing authorized users to access and change information in the database. 
 

docs/js-lang-procedures.md

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 # JS stored function or procedure
 
---8<--- "experimental.md"
+--8<--- "tech.preview.md:5:5"
 
 Once the component's installed, you can write stored functions and procedures in JavaScript. The syntax looks like this:
 

docs/js-lang-troubleshoot.md

@@ -1,6 +1,6 @@
 # Troubleshoot JS procedures and functions
 
---8<--- "experimental.md"
+--8<--- "tech.preview.md:5:5"
 
 The component includes a set of User-Defined Functions (UDFs) that retrieve and clear information about the last JS error that occurred in the current connection for the current user. This information updates each time a JS error occurs for the current connection and user. Successful execution of JS code does not change this state.