docs: Make file properties heading names in Grouping & Sorting match Filters

Author: claremacrae

docs/Queries/Grouping.md

@@ -154,16 +154,32 @@ For more information, including adding your own customised statuses, see [[Statu
 
 ## Group by File Properties
 
+### File Path
+
 1. `path` (the path to the file that contains the task, that is, the folder and the filename)
+
+### Root
+
 1. `root` (the top-level folder of the file that contains the task, that is, the first directory in the path, which will be `/` for files in root of the vault)
+
+> [!released]
+`root` grouping option was introduced in Tasks 1.11.0.
+
+### Folder
+
 1. `folder` (the folder to the file that contains the task, which will be `/` for files in root of the vault)
+
+### File Name
+
 1. `filename` (the link to the file that contains the task, without the `.md` extension)
     - Note that tasks from different notes with the same file name will be grouped together in the same group.
 
-> [!released]
-`root` grouping option was introduced in Tasks 1.11.0.
+### Backlink
 
 1. `backlink` (the text that would be shown in the task's [[Backlinks|backlink]], combining the task's file name and heading, but with no link added)
+
+### Heading
+
 1. `heading` (the heading preceding the task, or `(No heading)` if there are no headings in the file)
 
 ## Multiple groups

docs/Queries/Sorting.md

@@ -92,13 +92,28 @@ For more information, including adding your own customised statuses, see [[Statu
 
 ## Sort by File Properties
 
+### File Path
+
 1. `path` (the path to the file that contains the task)
+
+### Root
+
+It is not currently possible to sort by the top-level folder that contains the task.
+
+### Folder
+
+It is not currently possible to sort by the folder that contains the task.
+
+### File Name
+
 1. `filename` (the filename of the file that contains the task, with its extension)
     - Note that tasks from different notes with the same file name will be sorter.
 
 > [!released]
 `sort by filename` was introduced in Tasks 1.21.0.
 
+### Heading
+
 1. `sort by heading` (the heading preceding the task; files with empty headings sort before other tasks)
 
 > [!released]