update some sponsor logos

Author: Kimberley Cook

src/assets/company-logos/spektrix.png

@@ -314,12 +314,12 @@ <h3 class="bigger-text">Some of our Key Industry Partners</h3>
     </ul>
     <ul class="logos">
       <li><a href="https://www.dabapps.com/" target="_blank"><img src="assets/company-logos/dabapps.svg" alt="Dabapps logo"/></a></li>
-      <li><a href="https://www.10xbanking.com/" target="_blank"><img src="assets/company-logos/10x.svg" alt="10x logo"/></a></li>
+      <li><a href="https://www.travelperk.com/" target="_blank"><img src="assets/company-logos/travelperk.png" alt="TravelPerk logo"/></a></li>
       <li><a href="https://www.google.com/" target="_blank"><img src="assets/company-logos/google.svg" alt="Google logo"/></a></li>
     </ul>
     <ul class="logos">
       <li><a href="https://www.gousto.co.uk/" target="_blank"><img src="assets/company-logos/gousto.svg" alt="Gousto logo"/></a></li>
-      <li><a href="https://www.idbs.com" target="_blank"><img src="assets/company-logos/IDBS.svg" alt="IDBS logo"/></a></li>
+      <li><a href="https://www.spektrix.com/en-gb/" target="_blank"><img src="assets/company-logos/spektrix.png" alt="Spektrix logo"/></a></li>
     </ul>
     <ul class="logos">
       <li><a href="https://www.skyscanner.net/" target="_blank"><img src="assets/company-logos/skyscanner.svg" alt="Skyscanner logo"/></a></li>

src/assets/company-logos/travelperk.png

@@ -155,7 +155,8 @@
     padding: 30px;
   }
   img {
-    height: 80px;
+    max-height: 80px;
+    max-width: 300px;
   }
 }
 
@@ -455,7 +456,7 @@ ul {
   padding: 10px 10px 10px 20px;
 
   img {
-    width: 40px;
+    width: 50px;
     margin-left: 5px;
   }