[12.x] Fix anchor links in Collections docs for consistency

[AhmedAlaa4611]

Description

This PR updates several anchor links in the collections.md to use kebab-case to align with the consistent format used throughout the docs. For example:

• #method-chunkwhile → #method-chunk-while
• #method-intersectAssoc → #method-intersect-assoc
• #method-countBy → #method-count-by

These changes improve overall consistency in the docs, as some method anchors such as first-or-fail, first-where, and reduce-spread already follow kebab-case formatting.

[AhmedAlaa4611]

I know that this may be a big PR, but I made it cautiously and reviewed it three times.

[taylorotwell]

Unfortunately it would break all existing links on the web to these methods.

[AhmedAlaa4611]

@taylorotwell Should we target the master branch instead?

[shaedrich]

This would work for https://laravel.com/docs/13.x/* links but not for https://laravel.com/docs/* (version omitted, shortcut for current version) links

[AhmedAlaa4611]

@shaedrich I understand you, but should we leave them not in a kebab-case forever? or there is a way to update them?

[shaedrich]

Technically, you could probably create a redirect at https://github.com/laravel/bootcamp.laravel.com/blob/main/routes/web.php to preserve backward compatibility, but I'm not sure if Taylor would be willing to add that kind of complexity to that repository

[AhmedAlaa4611]

@shaedrich

I'm not sure if Taylor would be willing to add that kind of complexity to that repository

I think that too, can we update them in all https://laravel.com/docs/*? what do you think about that?

[shaedrich]

I'm afraid, I can't follow 🤔

[AhmedAlaa4611]

I mean updating all branches with these changes.

[shaedrich]

But the problem will remain as other sites will link here with the current version shortcut. And they won't all update their links

[AhmedAlaa4611]

Maybe, but I've seen many articles that share tips or list top ten helpful methods in Laravel without referencing the official documentation. They rely solely on their own explanations, so I don't think it's a very important issue to worry about.

[shaedrich]

That may be true. I just wanted to voice my concerns and my interpretation of Taylor's words earlier. But I don't really know the impact, it would potentially have.