The problem of capital letters in link tags

[mam4dali]

• [+ ] I've read and understood the contribution guidelines.
• [+ ] I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened.

Hello! Good time
I recently got an error in the google console:
Alternate page with proper canonical tag
After checking, I found that these errors are due to capital letters in the address
For example:
https://example.com/tag/Looper/
The plugin puts the canonical tag like this:
https://example.com/tag/looper/
So far everything is fine and the plugin is working fine
However, tags may be indexed in Google with capital letters

Please describe what you expected to happen and why.

In such cases, it is better to move the first address in uppercase letters to the second address in lowercase letters according to the value of the canonical tag

How can we reproduce this behavior?

1. Put capital letters in the address tag

Used versions

• WordPress version: 6.1
• Yoast SEO version: 19.9
• Classic Editor plugin version: 1.6.2

[mmikhan]

It looks like WordPress change the capital case to lower case string format in the slug itself. So, not sure how you are keeping the capital case in the tag slug.