Fix inlined jukebox song backup

Fixes #949

build-logic/build.gradle.kts

@@ -8,5 +8,5 @@ repositories {
 
 dependencies {
     // version must be manually kept in sync with the one in root project settings.gradle.kts
-    implementation("com.gradleup.shadow", "shadow-gradle-plugin", "8.3.0")
+    implementation("com.gradleup.shadow", "shadow-gradle-plugin", "8.3.5")
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_21to1_20_5/rewriter/BlockItemPacketRewriter1_21.java

@@ -311,7 +311,7 @@ public final class BlockItemPacketRewriter1_21 extends BackwardsStructuredItemRe
         final Either<Holder<JukeboxPlayable.JukeboxSong>, String> song;
         final String songIdentifier = tag.getString("song_identifier");
         if (songIdentifier != null) {
-            song = Either.right(tag.getString(songIdentifier));
+            song = Either.right(songIdentifier);
         } else {
             song = Either.left(restoreHolder(tag, "song", songTag -> {
                 final Holder<SoundEvent> soundEvent = restoreHolder(songTag, "sound_event", soundTag -> {

gradle.properties

@@ -1,4 +1,4 @@
-projectVersion=5.2.1
+projectVersion=5.2.2-SNAPSHOT
 
 # Smile emoji
 mcVersions=1.21.4,1.21.3,1.21.2,1.21.1,1.21,1.20.6,1.20.5,1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2, 1.18.1, 1.18, 1.17.1, 1.17, 1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16, 1.15.2, 1.15.1, 1.15, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14, 1.13.2, 1.13.1, 1.13, 1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1, 1.11, 1.10.2, 1.10.1, 1.10