Fix wrong reference on irradiance.reindl

[cbcrespo]

• Closes Likely wrong reference on irradiance.reindl #2765

Fixes the wrong reference in the irradiance.reindl docstrings, previously identified in #2765.

[ramaroesilva]

Never reviewed a PR before, but seems good to me :-)

[AdamRJensen]

@cbcrespo congrats with opening your first PR!

You'll notice that the "Python Flake8 Linter" is marked as red and with an x. If you click this, you can see the details which the linter is unhappy about (it's about good practice formatting).

While pvlib is not very consistent, we made a choice a while ago to use the IEEE citation format. You can read more about this here. Could you update the existing citations to match the IEEE format?

[cwhanse]

@cbrespo

For future PRs, please include the checkboxes in the template that's automatically added in the PR description. We use those to manage the review work. You can strikethrough those that don't apply using "~~" on both ends, like this:

• [ ] doesn't matter

[cbcrespo]

Thanks for the tips @AdamRJensen and @cwhanse.

I think I've fixed the problem now, and I've also changed the reference style to IEEE.