text: Title: Mark `iternal` as a typo of `internal`
  Body: ### Summary
  
  To address https://github.com/mlflow/mlflow/pull/14450#discussion_r1942071959, add `iternal` to the typo list:
  
  ```
  diff --git a/pyproject.toml b/pyproject.toml
  index aa6bb2aa3..82c83d53b 100644
  --- a/pyproject.toml
  +++ b/pyproject.toml
  @@ -294,6 +294,7 @@ fpr = "fpr"   # false positive rate
   gam = "gam"   # generalized additive models
   ser = "ser"   # serialization
   yhat = "yhat" # ŷ
  +iternal = "internal"
  ```
  
  ### Notes
  
  - Make sure to open a PR from a **non-master** branch.
  - Sign off the commit using the `-s` flag when making a commit:
  
    ```sh
    git commit -s -m "..."
             # ^^ make sure to use this
    ```
  
  - Include `#{issue_number}` (e.g. `#123`) in the PR description when opening a PR.
  