chore(injections)!: update injection syntax to 0.9

Since 0.9, @lang syntax is still available as fallback but will soon be deprecated.
Because of that, new syntax should be adopted once 0.9 becomes the
baseline requirements for nvim-treesitter

- update health check
- update doc

queries/latex/injections.scm

@@ -1,22 +1,25 @@
-[
- (line_comment)
- (block_comment)
- (comment_environment)
-] @comment
+([
+  (line_comment)
+  (block_comment)
+  (comment_environment)
+ ] @injection.content
+ (#set! injection.language "comment"))
 
 (pycode_environment
-  code: (source_code) @python
-)
+  code: 
+  (source_code) @injection.content 
+  (#set! injection.language "python"))
 
 (minted_environment
   (begin
     language: (curly_group_text
-               (text) @language))
-  (source_code) @content)
+               (text) @injection.language))
+  (source_code) @injection.content)
 
 ((generic_environment
   (begin
    name: (curly_group_text
-           (text) @_env))) @c
+           (text) @_env))) @injection.content
+   (#set! injection.language "c")
    (#any-of? @_env "asy" "asydef"))