18Kami: Fix Pages (#4292)

* Fix Pages

* Update extVersionCode

* Typo Fix

src/en/kami18/build.gradle

@@ -1,7 +1,7 @@
 ext {
     extName = '18Kami'
     extClass = '.Kami18'
-    extVersionCode = 1
+    extVersionCode = 2
     isNsfw = true
 }
 

src/en/kami18/src/eu/kanade/tachiyomi/extension/en/kami18/Kami18.kt

@@ -153,7 +153,7 @@ class Kami18() : HttpSource() {
         val document = response.asJsoup()
         val contents = document.select("[id*=pageselect] > option")
 
-        val id = response.request.url.toString().filter { it.isDigit() }
+        val id = response.request.url.toString().substringAfter("photo/").filter { it.isDigit() }
         return contents.mapIndexed { idx, image ->
             val filename = image.attr("data-page")
             Page(idx, imageUrl = "$baseImageUrl/$id/$filename")