docs: Add links to Custom Sorting page

Author: claremacrae

docs/Queries/About Queries.md

@@ -87,7 +87,7 @@ The only exceptions to this flexibility are:
 
 - When [[Combining Filters]], the boolean operators such as `AND`, `OR` and `NOT` must still be capitalised.
 - In [[Regular Expressions]], the search pattern and flags are still case-sensitive.
-- The code in expressions in [[Custom Filters]] and [[Custom Grouping]] remain case-sensitive.
+- The code in expressions in [[Custom Filters]], [[Custom Sorting]] and [[Custom Grouping]] remain case-sensitive.
 
 ### Why is my query not working?
 

docs/Queries/Line Continuations.md

@@ -42,7 +42,7 @@ Explanation of this Tasks code block query:
 ```
 <!-- endSnippet -->
 
-This facility will be helpful for long [[Combining Filters]], [[Custom Filters]], and [[Custom Grouping]] lines, and other queries that may be difficult to read on one line.
+This facility will be helpful for long [[Combining Filters]], [[Custom Sorting]], and [[Custom Grouping]] lines, and other queries that may be difficult to read on one line.
 
 There are some more realistic examples towards the end of the [[Grouping#Due Date|Due date custom grouping examples]].
 

docs/Scripting/Expressions.md

@@ -22,9 +22,10 @@ publish: true
 - The expression is a string instruction.
 - As of Tasks 4.4.0, variables, functions, `if` blocks and similar can be used. See [[#More complex expressions]].
 - As of Tasks 5.0.0, long expressions can be written over multiple lines thanks to [[Line Continuations]].
-- Depending on the context, one or two tasks are passed in to the expression, and a calculation is performed.
-  - As of Tasks 4.0.0, in fact only a single task is passed in, to implement [[Custom Grouping]].
+- One task is passed in to the expression, and a calculation is performed.
+  - As of Tasks 4.0.0, a single task is passed in, to implement [[Custom Grouping]].
   - As of Tasks 4.2.0, a single task is passed in, to implement [[Custom Filters]].
+  - As of Tasks X.Y.Z, a single task is passed in, to implement [[Custom Sorting]].
 - Tasks then calculates a value from the inputs.
 
 ## Example expressions

docs/Scripting/Query Properties.md

@@ -17,6 +17,7 @@ In a growing number of locations, Tasks allows programmatic/scripting access to
 
 - [[Placeholders]]
 - [[Custom Filters]]
+- [[Custom Sorting]]
 - [[Custom Grouping]]
 
 This page documents all the available pieces of information in Queries that you can access.

docs/Scripting/Task Properties.md

@@ -14,6 +14,7 @@ publish: true
 In a growing number of locations, Tasks allows programmatic/scripting access to values in your Tasks:
 
 - [[Grouping#Custom Groups]]
+- [[Sorting#Custom Sorting]]
 - [[Filters#Custom Filters]]
 
 This page documents all the available pieces of information in Tasks that you can access.