fix: add missing alt attributes in other kanvas pages

Signed-off-by: Lorenzo Croce <lorenzo.croce@arenastudios.it>

Author: Fireentity

src/sections/Kanvas/Kanvas-design/kanvas-design-banner.js

@@ -166,8 +166,8 @@ const KanvasDesignBanner = () => {
         <Button $secondary title="Experience context-aware design" $url="https://kanvas.new" external={ true } />
         <h5>Upload your Helm Chart or Kubernetes manifest to have your infra diagrammed</h5>
       </div>
-      <img className="dots-upper" src={BackgroundDotsPattern}  />
-      <img className="dots-lower" src={BackgroundDotsPattern}  />
+      <img className="dots-upper" src={BackgroundDotsPattern} alt="" aria-hidden="true" />
+      <img className="dots-lower" src={BackgroundDotsPattern} alt="" aria-hidden="true" />
     </DesignBannerWrapper>
 
   );

src/sections/Kanvas/Kanvas-design/kanvas-design-integrations.js

@@ -131,7 +131,7 @@ const KanvasIntegrationsSection = () => {
           </h1>
         </div>
         <div>
-          <img className="underline-img" src={UnderlineImg} />
+          <img className="underline-img" src={UnderlineImg} alt="" />
         </div>
         <div>
           <h4>