Enhance archived notice with discussion link

Updated archived notice to include a link to discussion.

Author: reece

README.md

@@ -1,6 +1,10 @@
 # eutils -- simplified interface to NCBI E-Utilities
 
-**eutils has been archived. See discussion in #205 for rationale.**
+---
+
+**eutils has been archived. See discussion in [#205](https://github.com/biocommons/eutils/discussions/205) for rationale.**
+
+---
 
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