Update to use model parameter in claude-code-base-action

This updates claude-code-action to pass the model parameter to claude-code-base-action using the new primary `model` parameter instead of the deprecated `anthropic_model`.

This change is made in conjunction with https://github.com/anthropics/claude-code-base-action/pull/4 which adds the `model` parameter to claude-code-base-action.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

test/mockContext.ts

@@ -10,7 +10,7 @@ import type {
 const defaultInputs = {
   triggerPhrase: "/claude",
   assigneeTrigger: "",
-  anthropicModel: "claude-3-7-sonnet-20250219",
+  anthropicModel: "claude-3-5-sonnet-20241022",
   allowedTools: "",
   disallowedTools: "",
   customInstructions: "",