Added wording for supported hardware platforms in CONTRIBUTING (#1797)

Co-authored-by: Alexey Kukanov <[email protected]>

Author: vossmjp

CONTRIBUTING.md

@@ -43,4 +43,8 @@ You can find all [open oneTBB pull requests](https://github.com/uxlfoundation/on
   * the copyright year should be `2025` for new files
 * Submit a pull request into the master branch. You can submit changes with a pull request (preferred) or by sending an email patch.  
 
+Code changes that are known or suspected to break support for any currently supported hardware are not allowed.
+Contributors should make a reasonable effort to ensure compatibility with these platforms. If a contribution
+inadvertently affects hardware support, the community will work together to address and resolve the issue.
+
 Continuous Integration (CI) testing is enabled for the repository. Your pull request must pass all checks before it can be merged. We will review your contribution and may provide feedback to guide you if any additional fixes or modifications are necessary. When reviewed and accepted, your pull request will be merged into our GitHub repository. 

SYSTEM_REQUIREMENTS.md

@@ -33,6 +33,7 @@ This document provides details about hardware, operating system, and software pr
 - Intel(R) Atom* processor family
 - Non-Intel(R) processors compatible with the processors listed above
 
+Changes to the list of supported hardware will be announced in advance with a deprecation period preceding removal or reduction of support.
 
 ## Software