Rollup merge of #59474 - czipperz:bufwriter-fix-link-capitalization, r=Centril
Rollup merge of #59474 - czipperz:bufwriter-fix-link-capitalization, r=Centril

Fix link capitalization in documentation of std::io::BufWriter.

graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust