Fix issue #110: Redesigned the logos on the 'Our Goals' page (#115)

* #110-Redesigned Logos of Goals Page

* #110-Fixed An Error

* Renamed old logos to 'previous-*'

index.html

@@ -135,21 +135,21 @@
       <div class="line"></div>
     </div>
     <div class="images">
-      <img src="./assets/images/Target.webp" width="200px" />
+      <img src="./assets/images/Target.png" width="200px" />
       <div class="text">
         <span>TARGET<br /><br /></span>Planting 1 million trees worldwide
         within the next 3 years.
       </div>
     </div>
     <div class="images">
-      <img src="./assets/images/Reach.webp" width="200px" />
+      <img src="./assets/images/Reach.png" width="200px" />
       <div class="text">
         <span>REACH<br /><br /></span>Expanding tree planting efforts to 30+
         countries across the world.
       </div>
     </div>
     <div class="images">
-      <img src="./assets/images/Awareness.webp" width="200px" />
+      <img src="./assets/images/Awareness.png" width="200px" />
       <div class="text">
         <span>EDUCATION AND AWARENESS<br /><br /></span>Raising awareness
         about the importance of tree planting through educational programs,