BatCave: Fix page url (#7529)

fix: page url

src/en/batcave/build.gradle

@@ -1,7 +1,7 @@
 ext {
     extName = 'BatCave'
     extClass = '.BatCave'
-    extVersionCode = 1
+    extVersionCode = 2
 }
 
 apply from: "$rootDir/common.gradle"

src/en/batcave/src/eu/kanade/tachiyomi/extension/en/batcave/BatCave.kt

@@ -221,7 +221,8 @@ class BatCave : HttpSource() {
             .parseAs<Images>()
 
         return data.images.mapIndexed { idx, img ->
-            Page(idx, imageUrl = baseUrl + img.trim())
+            val imageUrl = if (img.startsWith("https")) img.trim() else baseUrl + img.trim()
+            Page(idx, imageUrl = imageUrl)
         }
     }