hotfix icon for unknown models

[mingming-ma]

I tried to fixed similar issue in #564 for Free AI Models and not covered all situations, my bad 😢
I should have added the second check this.name.includes("gpt") in the src/lib/ChatCraftModel.ts

    if (vendor === "openai" && this.name.includes("gpt")) {
      return "/openai-logo.png";
    }

Results

(Bg color is fixed for same name.)

Though more work needed to have better looking as described in issue #611.