DemonSect(Seita Celestial): update icons and extension name (#4891)

* Rename "DemonSect" as "Seita Celestial", update logos

* Rename File name to: "SeitaCelestial"

src/pt/prismascans/build.gradle

@@ -1,9 +1,9 @@
 ext {
-    extName = 'Demon Sect'
+    extName = 'Seita Celestial'
-    extClass = '.DemonSect'
+    extClass = '.SeitaCelestial'
     themePkg = 'mangathemesia'
     baseUrl = 'https://seitacelestial.com'
-    overrideVersionCode = 16
+    overrideVersionCode = 17
 }
 
 apply from: "$rootDir/common.gradle"

src/pt/prismascans/src/eu/kanade/tachiyomi/extension/pt/prismascans/SeitaCelestial.kt

@@ -9,14 +9,14 @@ import okhttp3.OkHttpClient
 import rx.Observable
 import java.util.concurrent.TimeUnit
 
-class DemonSect : MangaThemesia(
+class SeitaCelestial : MangaThemesia(
-    "Demon Sect",
+    "Seita Celestial",
     "https://seitacelestial.com",
     "pt-BR",
     "/comics",
 ) {
 
-    // Changed their name from Prisma Scans to Demon Sect.
+    // They changed their name from Prisma Scans to Demon Sect and now to Celestial Sect.
     override val id: Long = 8168108118738519332
 
     override val client: OkHttpClient = super.client.newBuilder()