added language to html tag

[kartikgajjar7]

Fixes Issue

Changes proposed

Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [x] My change requires changes to the documentation.
• [x] I have updated the documentation accordingly.
• [x] All new and existing tests passed.
• [x] This PR does not contain plagiarized content.
• [x] The title of my pull request is a short description of the requested changes.

Screenshots

Note to reviewers

[github-actions[bot]]

Alex Recommends Report

Alex recommends the following language changes, but Alex is a regular expression based algorithm, so take them with a grain of salt.

:sparkles: :rocket: :sparkles: Nothing to Report :sparkles: :rocket: :sparkles:

[E-fais]

Can you please explain why you are suggesting this change?

[naomi-lgbt]

According to MDN:

Note: The default value of lang is unknown, therefore it is recommended to always specify this attribute with the appropriate value.