refactor: revert media query range notation (#1072)

Media queries range syntax not supported by Safari for iOS under 16.4

See also:
- https://caniuse.com/?search=media-queries

This reverts commit 1682ce9d7c.

_sass/layout/home.scss

@@ -139,7 +139,7 @@
 } /* .pagination */
 
 /* Tablet */
-@media all and (width >= 768px) {
+@media all and (min-width: 768px) {
   #post-list {
     %img-radius {
       border-radius: 0 $base-radius $base-radius 0;
@@ -173,7 +173,7 @@
 }
 
 /* Hide SideBar and TOC */
-@media all and (width <= 830px) {
+@media all and (max-width: 830px) {
   .pagination {
     justify-content: space-evenly;
 
@@ -186,7 +186,7 @@
 }
 
 /* Sidebar is visible */
-@media all and (width >= 831px) {
+@media all and (min-width: 831px) {
   #post-list {
     margin-top: 2.5rem;
   }
@@ -212,7 +212,7 @@
 }
 
 /* Panel is visible */
-@media all and (width >= 1200px) {
+@media all and (min-width: 1200px) {
   #post-list {
     padding-right: 0.5rem;
   }