Clarify table of contents menu icon label (#59306)

Co-authored-by: Sunbrye Ly <56200261+sunbrye@users.noreply.github.com>

Author: yamiacat

content/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax.md

@@ -24,7 +24,7 @@ To create a heading, add one to six <kbd>#</kbd> symbols before your heading tex
 
 ![Screenshot of rendered GitHub Markdown showing sample h1, h2, and h3 headers, which descend in type size and visual weight to show hierarchy level.](/assets/images/help/writing/headings-rendered.png)
 
-When you use two or more headings, GitHub automatically generates a table of contents that you can access by clicking {% octicon "list-unordered" aria-label="The unordered list icon" %} within the file header. Each heading title is listed in the table of contents and you can click a title to navigate to the selected section.
+When you use two or more headings, GitHub automatically generates a table of contents that you can access by clicking the "Outline" menu icon {% octicon "list-unordered" aria-label="Table of Contents" %} within the file header. Each heading title is listed in the table of contents and you can click a title to navigate to the selected section.
 
 ![Screenshot of a README file with the drop-down menu for the table of contents exposed. The table of contents icon is outlined in dark orange.](/assets/images/help/repository/headings-toc.png)
 

content/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-readmes.md

@@ -38,7 +38,7 @@ When your README is viewed on GitHub, any content beyond 500 KiB will be truncat
 
 ## Auto-generated table of contents for markdown files
 
-For the rendered view of any Markdown file in a repository, including README files, {% data variables.product.github %} will automatically generate a table of contents based on section headings. You can view the table of contents for a README file by clicking the {% octicon "list-unordered" aria-label="Table of Contents" %} menu icon in the top corner of the rendered page.
+For the rendered view of any Markdown file in a repository, including README files, {% data variables.product.github %} will automatically generate a table of contents based on section headings. You can view the table of contents for a README file by clicking the "Outline" menu icon {% octicon "list-unordered" aria-label="Table of Contents" %} in the top corner of the rendered page.
 
 ## Section links in markdown files and blob pages