[Support] Update contacting-cloudflare-support.mdx

Hello team, 

I believe adding the link to our docs on how to generate HAR files will be handy for our customers here.

Thanks!

Author: nenizera

src/content/docs/support/contacting-cloudflare-support.mdx

@@ -101,7 +101,7 @@ To submit a support case, follow these steps:
     - A description of the actual results vs expected results
     - Steps to reproduce the issue, with example URLs 
     - Exact error messages
-    - HAR files
+    - [HAR files](/support/troubleshooting/general-troubleshooting/gathering-information-for-troubleshooting-sites/#generate-a-har-file)
     - Screenshots
     - Relevant logs from the origin web server
     - Output from [test tools](/support/troubleshooting/general-troubleshooting/gathering-information-for-troubleshooting-sites/) such as MTR, traceroute, dig/nslookup, and cURL
@@ -132,7 +132,7 @@ _Packet Capture_
 - pcap, pcapng, cap
 
 Cloudflare Support only accepts the WARP diagnostics as compressed files.
-Please do not upload ZIP or RAR files when sharing HAR files, and please do not share compressed documents like DOCX, XLSX or PPTX.
+Please do not upload ZIP or RAR files when sharing [HAR files](/support/troubleshooting/general-troubleshooting/gathering-information-for-troubleshooting-sites/#generate-a-har-file), and please do not share compressed documents like DOCX, XLSX or PPTX.
 
 The maximum file size is **20 MB**.
 If you need to share a larger file, please provide a link to the file using Google Drive or a similar sharing platform of your choice.