fix: display correct information in error statement

[timmahrt]

Fix for https://github.com/timmahrt/praatIO/issues/56

Before this PR:

• the incorrect interval was included in the error message for an unhandled exception

After this PR:

• the correct interval is included in the error message

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (8069e3d) 77.21% compared to head (ec64aa6) 77.21%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #57 +/- ## ======================================= Coverage 77.21% 77.21% ======================================= Files 21 21 Lines 2638 2638 ======================================= Hits 2037 2037 Misses 601 601 ``` | [Impacted Files](https://app.codecov.io/gh/timmahrt/praatIO/pull/57?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tim) | Coverage Δ | | |---|---|---| | [praatio/data\_classes/interval\_tier.py](https://app.codecov.io/gh/timmahrt/praatIO/pull/57?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tim#diff-cHJhYXRpby9kYXRhX2NsYXNzZXMvaW50ZXJ2YWxfdGllci5weQ==) | `98.77% <ø> (ø)` | |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.