Auto merge of #13653 - VannTen:fix/doc-typo-vim-lsp, r=Veykril
Auto merge of #13653 - VannTen:fix/doc-typo-vim-lsp, r=Veykril

Fix typo on 'configuration' anchor

https://rust-analyzer.github.io/manual.html#_configuration lands you at
the start of the page, while
https://rust-analyzer.github.io/manual.html#configuration correctly puts
you at the correct anchor

rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer