Add required first level titles in doc files (#51708)

Author: sebastienros

docs/HelpWantedIssueSummaryCommentTemplate.md

@@ -2,11 +2,13 @@
 
 **IMPORTANT**: As part of posting this comment, please make sure:
 - that the issue is properly labeled with both `area-` and `feature-` labels.
-- to apply one of the `Complexity: ` labels is applied to the issue [Simple | Medium | Hard]
+- to apply one of the `Complexity: <value>` labels is applied to the issue [Simple | Medium | Hard]
 - for an issue which was marked with `Complexity: Simple` label, it may be a good fit for a first-time contributors to this repo.
   If so, please also apply `good-first-issue` label.
 -->
 
+# Help Wanted
+
 ## Issue Summary
 
 <!-- This section will be filled in by the engineers assigned to this  -->

docs/HelpWantedProcess.md

@@ -1,3 +1,5 @@
+# Help Wanted Process
+
 This document describes the process that the team uses for identifying candidate issues for community members to tackle.
 
 ## Process
@@ -6,7 +8,7 @@ This process (we'll refer to it as `help-wanted` process going forward) triggers
 1. The triage team will **assign the `help-candidate` label** to the issue, as well as **assign an engineer to the issue**.
 2. The task for the assigned engineer will be to understand the ask based on all the comments in the issue and **summarize the problem in a comment** using the [Help Wanted Template](/docs/HelpWantedIssueSummaryCommentTemplate.md).
 3. As part of filling out the template, the engineer will also need to **describe a high-level design for how to approach the problem and how it can be solved**.
-4. When all the sections of the template are filled in, the engineer will then need to **apply one of the `Complexity: ` labels**, to indicate how easy / hard will it be to tackle the issue.
+4. When all the sections of the template are filled in, the engineer will then need to **apply one of the `Complexity: <value>` labels**, to indicate how easy / hard will it be to tackle the issue.
  This will help community members to find the right type of issue to contribute to.
 5. After posting this comment, the assigned **engineer will unassign themself** from the issue and will **replace the `help-candidate` label with `help-wanted` label**, as an indicator, that the issue is ready for the community to pick up.