Add links to improve discoverability (github#19563)

Author: skedwards88

content/github/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request.md

@@ -76,3 +76,6 @@ After your pull request has been reviewed, it can be [merged into the repository
 - "[Creating a pull request from a fork](/articles/creating-a-pull-request-from-a-fork)"
 - "[Changing the base branch of a pull request](/articles/changing-the-base-branch-of-a-pull-request)"
 - "[Adding issues and pull requests to a project board from the sidebar](/articles/adding-issues-and-pull-requests-to-a-project-board/#adding-issues-and-pull-requests-to-a-project-board-from-the-sidebar)"
+- "[About automation for issues and pull requests with query parameters](/issues/tracking-your-work-with-issues/creating-issues/about-automation-for-issues-and-pull-requests-with-query-parameters)"
+- "[Assigning issues and pull requests to other GitHub users](/issues/tracking-your-work-with-issues/managing-issues/assigning-issues-and-pull-requests-to-other-github-users)"
+- "[Writing on GitHub](/github/writing-on-github)"

content/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/commenting-on-a-pull-request.md

@@ -58,6 +58,6 @@ Anyone watching the pull request or repository will receive a notification of yo
 
 ### Further reading
 
-- "[Creating a permanent link to a code snippet](/articles/creating-a-permanent-link-to-a-code-snippet/)"
+- "[Writing on GitHub](/github/writing-on-github)"
 {% if currentVersion == "free-pro-team@latest" %}- "[Reporting abuse or spam](/communities/maintaining-your-safety-on-github/reporting-abuse-or-spam)"
 {% endif %}

content/issues/tracking-your-work-with-issues/creating-issues/creating-an-issue.md

@@ -53,4 +53,4 @@ If you're using a project board to track and prioritize your work, you can conve
 {% data reusables.repositories.submit-new-issue %}
 ### Further reading
 
-- "[Creating a permanent link to a code snippet](/github/managing-your-work-on-github/creating-a-permanent-link-to-a-code-snippet)"
+- "[Writing on GitHub](/github/writing-on-github)"