Add additional resources in the learning area

[glmvc]

Summary

added additional resources in some articles in the learning area modules:

• HTML Multimedia and embedding Adding vector graphics to the Web article
• CSS Layout Flexbox article
• CSS Layout Grid article
• CSS Layout Responsive Design article

Motivation

For me personally, the added learning resources helped tremendously (in addition to the MDN articles) with my progress/understanding.

Metadata

• Adds a new document
• Rewrites (or significantly expands) a document
• Fixes a typo, bug, or other error

[github-actions]

Preview URLs

• https://pr15056.content.dev.mdn.mozit.cloud/en-US/docs/Learn/CSS/CSS_layout/Flexbox
• https://pr15056.content.dev.mdn.mozit.cloud/en-US/docs/Learn/CSS/CSS_layout/Grids
• https://pr15056.content.dev.mdn.mozit.cloud/en-US/docs/Learn/CSS/CSS_layout/Responsive_Design
• https://pr15056.content.dev.mdn.mozit.cloud/en-US/docs/Learn/HTML/Multimedia_and_embedding/Adding_vector_graphics_to_the_Web

Flaws

Note! 2 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Learn/CSS/CSS_layout/Responsive_Design
Title: Responsive design
on GitHub
Flaw count: 1

• broken_links:
  • Link points to the page it's already on

---

URL: /en-US/docs/Learn/CSS/CSS_layout/Flexbox
Title: Flexbox
on GitHub
Flaw count: 1

• broken_links:
  • Link points to the page it's already on

External URLs

URL: /en-US/docs/Learn/CSS/CSS_layout/Grids
Title: Grids
on GitHub

• https://css-tricks.com/snippets/css/complete-guide-grid/ (1 time) (Note! This may be a new URL 👀)
• https://cssgridgarden.com/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Learn/CSS/CSS_layout/Responsive_Design
Title: Responsive design
on GitHub

• https://css-tricks.com/a-complete-guide-to-css-media-queries/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Learn/CSS/CSS_layout/Flexbox
Title: Flexbox
on GitHub

• https://css-tricks.com/snippets/css/a-guide-to-flexbox/ (1 time) (Note! This may be a new URL 👀)
• https://flexboxfroggy.com/ (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Learn/HTML/Multimedia_and_embedding/Adding_vector_graphics_to_the_Web
Title: Adding vector graphics to the Web
on GitHub

• https://css-tricks.com/svg-properties-and-css/ (1 time) (Note! This may be a new URL 👀)

[wbamberg]

👍 thanks!