fix(learning): load readme images over https

src/lib/learning.ts

@@ -132,7 +132,7 @@ export function isLearningProjectMediaUrl(value: string): boolean {
   return PROJECT_MEDIA_URL_PATTERN.test(value);
 }
 
-export function isSafeLearningCoverUrl(value: string): boolean {
+export function isSafeLearningImageUrl(value: string): boolean {
   if (PROJECT_MEDIA_URL_PATTERN.test(value)) return true;
   try {
     const url = new URL(value);