Update links in pull request template to point to latest documentation

[bouweandela]

Description

Update the links in the pull request template, to point to the 'latest' documentation instead of to the documentation built for #2031. This is needed because I forgot to do it before merging #2031.

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• ☝ Create an issue to discuss what you are going to do

Checklist

It is the responsibility of the author to make sure the pull request is ready to review. The icons indicate whether the item will be subject to the 🛠 Technical or 🧪 Scientific review.

• 🛠 This pull request has a descriptive title
• 🛠 Code is written according to the code quality guidelines
• 🛠 Documentation is available
• 🛠 Tests run successfully
• 🛠 The list of authors is up to date
• 🛠 Any changed dependencies have been added or removed correctly
• 🛠 All checks below this pull request were successful

New or updated recipe/diagnostic

• 🧪 Recipe runs successfully
• 🧪 Recipe is well documented
• 🧪 Figure(s) and data look as expected from literature
• 🛠 Provenance information has been added

New or updated data reformatting script

• 🛠 Documentation is available
• 🛠 The dataset has been added to the CMOR check recipe
• 🧪 Numbers and units of the data look physically meaningful

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• 🙏 We kindly ask you to review two other open pull requests in this repository

[nielsdrost]

Checked links, work, thanks @bouweandela!