fix(index): members hover uses box-shadow to fix hydration issue

A React hydration issue made the light-mode version of the
hover colors appear on dark-mode version of the website, making
it way too bright. Therefore, we're just going to be using a
box-shadow to make it easier on the eyes.

Resolves #36
Ref: facebook/docusaurus#7986

src/components/members.scss

@@ -1,15 +1,3 @@
-.lightMemberBackground {
-	&:hover {
-		background-color: rgb(240, 240, 240);
-	}
-}
-
-.darkMemberBackground {
-	&:hover {
-		background-color: rgb(50, 50, 50);
-	}
-}
-
 .member_container {
 	width: 300px;
 	margin: 10px;
@@ -19,6 +7,7 @@
 
 	&:hover {
 		text-decoration: none;
+		box-shadow: 0 2px 10px grey;
 	}
 
 	img {