Updated the subject. (#614)

subjects/where-do-we-go/README.md

@@ -7,15 +7,19 @@ Tired of staying home for too long, you decide to develop a page to index ideas
 Write the function `explore` which creates a page displaying the list of `places` provided in the data file below:
 
 - sort the `places` from the Northest to the Southest
-- display a fullscreen-size `<section>` for each place ; use the pics hosted [here](/public/subjects/where-do-we-go/images) as `background` images
-- display a location indicator with the class `location`, displaying as text strings separated by `\n`, the `name` and the `coordinates` of the current place featured in the image, using the corresponding `color` as text color, which updates on scroll when the top of the next image reaches the middle of the screen height
-- display a compass indicating the latitude direction ; North if the user is scrolling up, South if he's scrolling down
-- when clicking on the page, open a link redirecting to the Google Maps' coordinates of the place currently displayed.
+- display a fullscreen-size `<section>` for each place ; use the pics hosted [here](/public/subjects/where-do-we-go/images) to set the `background` attribute with the corresponding image url
+- display a location indicator as a `<a>` tag in the middle of the screen which:
+  - has the class `location`
+  - displays as text strings separated by `\n`, the `name` and the `coordinates` of the current place featured in the image
+  - using the corresponding `color` as text color
+  - updates the `name`, `coordinates` and `color` on scroll, when the top of the next image reaches the middle of the screen height
+  - has the `href` attribute set to open a new tab redirecting to a Google Maps' URL with the coordinates of the place currently displayed
+- display a compass indicating the latitude direction ; `N` for North if the user is scrolling up, `S` for South if he's scrolling down
 
 ### Notions
 
 - [Wheel event](https://developer.mozilla.org/en-US/docs/Web/API/Element/wheel_event): [`deltaY`](https://developer.mozilla.org/en-US/docs/Web/API/WheelEvent/deltaY)
-- [`window`](https://developer.mozilla.org/en-US/docs/Web/API/Window): [`innerHeight`](https://developer.mozilla.org/en-US/docs/Web/API/Window/innerHeight), [`scrollY`](https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollY), [`open()`](https://developer.mozilla.org/en-US/docs/Web/API/Window/open)
+- [`window`](https://developer.mozilla.org/en-US/docs/Web/API/Window): [`innerHeight`](https://developer.mozilla.org/en-US/docs/Web/API/Window/innerHeight), [`scrollY`](https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollY)
 - Take a look at the [DMS coordinates system](https://en.wikipedia.org/wiki/Geographic_coordinate_system#Degrees:_a_measurement_of_angle)
 
 ### Provided files

subjects/where-do-we-go/index.html

@@ -30,6 +30,10 @@ section {
   width: 100vw;
 }
 
+a {
+  text-decoration: none;
+}
+
 .location {
   position: fixed;
   top: 0;