[docs] Remove redundant - and the from custom_tools.md (#29767)

[docs] Remove redundant  and  from custom_tools.md

docs/source/en/custom_tools.md

@@ -51,10 +51,10 @@ seemingly giving the agent some kind of memory.
 Let's take a closer look at how the prompt is structured to understand how it can be best customized.
 The prompt is structured broadly into four parts.
 
-- 1. Introduction: how the agent should behave, explanation of the concept of tools.
-- 2. Description of all the tools. This is defined by a `<<all_tools>>` token that is dynamically replaced at runtime with the tools defined/chosen by the user.
-- 3. A set of examples of tasks and their solution
-- 4. Current example, and request for solution.
+1. Introduction: how the agent should behave, explanation of the concept of tools.
+2. Description of all the tools. This is defined by a `<<all_tools>>` token that is dynamically replaced at runtime with the tools defined/chosen by the user.
+3. A set of examples of tasks and their solution
+4. Current example, and request for solution.
 
 To better understand each part, let's look at a shortened version of how the `run` prompt can look like:
 
@@ -301,7 +301,7 @@ and description and try refining your task request with it.
 ### Customizing the tool descriptions
 
 As we've seen before the agent has access to each of the tools' names and descriptions. The base tools 
-should have very precise names and descriptions, however, you might find that it could help to change the 
+should have very precise names and descriptions, however, you might find that it could help to change 
 the description or name of a tool for your specific use case. This might become especially important 
 when you've added multiple tools that are very similar or if you want to use your agent only for a certain 
 domain, *e.g.* image generation and transformations.