Fix protocol for Cline Anthropic integration (#69)

In the screenshot, the URL uses http whereas the instructions use https.
Since port 8989 appears to be serving http traffic, it seems like http
is the correct one.

Author: dmjb

docs/partials/_cline-providers.mdx

@@ -16,7 +16,7 @@ Anthropic API key, and choose your preferred model (we recommend
 `claude-3-5-sonnet-<latest>`).
 
 To enable CodeGate, enable **Use custom base URL** and enter
-`https://localhost:8989/anthropic`.
+`http://localhost:8989/anthropic`.
 
 <ThemedImage
   alt='Cline settings for Anthropic'