Update config.json (#1436)

PaulT89 · web-flow · commit 976b68801140 · 2022-01-20T12:59:15.000+01:00
One more among many it seems. 😉
diff --git a/exercises/practice/diffie-hellman/.meta/config.json b/exercises/practice/diffie-hellman/.meta/config.json
@@ -11,6 +11,7 @@
     "ErikSchierboom",
     "LeBlue",
     "lutostag",
+    "PaulT89",
     "petertseng",
     "rofrol",
     "stringparser",
