docs: update copy

SUPPORT.md

@@ -34,15 +34,15 @@ Please seek support in the following ways:
 -   **Security vulnerabilities**: if you would like to report a security vulnerability, please consult the stdlib [security policy][stdlib-security] and follow requested steps for responsible [disclosure][stdlib-security].
 -   **Questions**: for general questions (i.e., concerns which are **not** bug reports or explicit feature requests), please ask on either [GitHub discussions][stdlib-discussions] or on [Gitter][stdlib-gitter].
 
-Please do **not** file issues on the issue tracker seeking help or support debugging your application or open-source project when the encountered issues are specific to the use of your project and/or not pertinent to stdlib. You will have better luck in such instances seeking help from other users of stdlib via Stack Overflow or other non-stdlib affiliated public forums.
+Please do **not** file issues on the issue tracker seeking help or support debugging your application or open-source project when the encountered issues are specific to your project. You will have better luck in such instances seeking help from other users of stdlib via Stack Overflow or other non-stdlib affiliated public forums.
 
 * * *
 
 ### Asking Quality Questions
 
 Help us help you! Be sure to spend time framing questions and to provide links and other resources. Spending extra time at the outset can help save everyone time in the long run.
 
-When seeking help, you are encouraged to adhere the following principles in order to increase the likelihood of receiving a successful response:
+When seeking help, you are encouraged to adhere to the following principles in order to increase the likelihood of receiving a successful response:
 
 -   **Read documentation and other guides** for the project to see if you can answer the question or figure out the issue on your own. Try locating an example project, and explore how the project works to see if you can answer your question.
 
@@ -65,7 +65,7 @@ When seeking help, you are encouraged to adhere the following principles in orde
 
 -   **Proofread and cross-check** your question to ensure that your question is communicated as clearly as possible.
 
--   **Do not open duplicate issues** or litter an existing issue with +1's.
+-   **Do not open duplicate issues** or litter an existing issue with separate "+1" comments. If you want to "upvote" an issue or comment, instead of posting a separate comment, use GitHub's built-in [reaction support][github-reactions] to record a 👍 emoji response.
 
 -   **Do not e-mail (or reach out to via social media) specific project authors or contributors** asking for help debugging your project or application. Please be respectful of maintainer time, and respect that maintainers are likely to have other obligations outside of stdlib.
 
@@ -117,6 +117,8 @@ Copyright © The Stdlib [Authors][stdlib-authors].
 
 [remark-support]: https://github.com/remarkjs/.github/blob/8070442fde16e2c81f80bd65caab6d3a8cc090f4/support.md
 
+[github-reactions]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
 [cc-by-sa-4.0]: https://creativecommons.org/licenses/by-sa/4.0/
 
 </section>