docs(treesitter): fix language-injection url neovim#35592

Author: yochem

runtime/doc/news-0.9.txt

@@ -186,7 +186,7 @@ The following new APIs or features were added.
   Additionally |TSNode:range()| now takes an optional {include_bytes} argument.
 
 • Treesitter injection queries now use the format described at
-  https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection .
+  https://tree-sitter.github.io/tree-sitter/3-syntax-highlighting.html#language-injection .
   Support for the previous format will be removed in a future release.
 
 • Added |nvim_get_hl()| for getting highlight group definitions in a format

runtime/doc/treesitter.txt

@@ -551,7 +551,7 @@ TREESITTER LANGUAGE INJECTIONS                *treesitter-language-injections*
 <
 
 Note the following information is adapted from:
-  https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection
+https://tree-sitter.github.io/tree-sitter/3-syntax-highlighting.html#language-injection
 
 Some source files contain code written in multiple different languages.
 Examples include:

runtime/lua/vim/treesitter/languagetree.lua

@@ -988,7 +988,7 @@ end
 
 ---@private
 --- Extract injections according to:
---- https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection
+--- https://tree-sitter.github.io/tree-sitter/3-syntax-highlighting.html#language-injection
 ---@param match table<integer,TSNode[]>
 ---@param metadata vim.treesitter.query.TSMetadata
 ---@return string?, boolean, Range6[]