Changed excessively long alt text for 2 images (#885)

* Changed alt text for 2 images.

* Changed excessively long alt text

* Update alt text to be more descriptive

* Update alt text on setting-up-your-environment.mdx

---------

Co-authored-by: kit <[email protected]>

Author: sprinklehappiness

src/content/tutorials/en/setting-up-your-environment.mdx

@@ -4,7 +4,7 @@ description: A quick tutorial for setting up the p5.js Web Editor and VS Code to
 category: introduction
 categoryIndex: 0
 featuredImage: ../images/featured/SetupA.jpg
-featuredImageAlt: An interactive sketch in the p5.js Web Editor draws circles on the canvas as the mouse pointer moves.
+featuredImageAlt: An interactive sketch in the p5.js Editor draws circles on the canvas as the mouse pointer moves.
 relatedContent:
   references:
     - en/p5/setup
@@ -61,7 +61,7 @@ If you are new to p5.js, start with the [p5.js Web Editor](https://editor.p5js.o
 - Open a desktop browser on your computer and go to [https://editor.p5js.org/](https://editor.p5js.org/).
 - Click the [“Sign up”](https://editor.p5js.org/signup) link on the top-right of the web page.
 
-![An arrow pointing to the “Sign Up” link in the top right corner of the p5.js Editor.](../images/introduction/p5_editor_sign_up.png)
+![An arrow to the “Sign Up” link.](../images/introduction/p5_editor_sign_up.png)
 
 
 ### Step 2: Create an account with [p5.js Web Editor](https://editor.p5js.org/)
@@ -73,7 +73,7 @@ If you are new to p5.js, start with the [p5.js Web Editor](https://editor.p5js.o
   - Create and confirm a password. 
   - Click the “Sign Up” button.
 
-![An arrow pointing to the highlighted User Name, Emaill, Password, and Confirm Password fields on the Sign Up page.](../images/introduction/p5_editor_sign_up_page.png)
+![An arrow pointing to the highlighted fields on the Sign Up page, as described above.](../images/introduction/p5_editor_sign_up_page.png)
 
 - Using a Google account
   - Click on the button on the bottom of the page that says “Login with Google.”