chore: update pin for perplexity-ask

Author: mcp-registry-bot

servers/perplexity-ask/server.yaml

@@ -12,7 +12,7 @@ about:
   icon: https://avatars.githubusercontent.com/u/110299016?s=200&v=4
 source:
   project: https://github.com/ppl-ai/modelcontextprotocol
-  commit: f0a927c250e04b389ff5c34f6a2a85ad625668e8
+  commit: 6981365d1f2a29ced704e6425403dffc26bcff78
   dockerfile: perplexity-ask/Dockerfile
 config:
   description: Configure the connection to Perplexity