[ARM Incremental TypeSpec] PR only includes changes to readme or examples

[mikeharder]

If a PR includes only changes to readme.md in a TypeSpec spec, should ARM Incremental TypeSpec trigger and return true? Currently, it does not.

Example: #33067

Changing the check to do so, should be simple. Just include readme.md when finding changed files under resource-manager.

@rkmanda: What do you think?

[rkmanda]

This particular condition for autosignoff actually makes sense for all PRs including TypeSpec ones and I have this in the backlog. We can start by enabling this for TypeSpec first and then expand to all other PRs later.

[mikeharder]

@rkmanda: Similar, what if a PR only changes examples? Currently the check returns "false", but I think it should return "true", at least for existing TSP specs. Change to readme.md or examples clearly seem like safe "incremental changes".