Fix version file in 8.2 branch

Change-Id: I213d3f3d7b0799cda364f5eb72725c35b7ccb783
diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index 5d1b711..3349fc8 100644
--- a/src/main/java/com/android/tools/r8/Version.java
+++ b/src/main/java/com/android/tools/r8/Version.java
@@ -9,7 +9,7 @@
 /** Version of the D8/R8 library. */
 public final class Version {
 
-  private static final String MAIN_LABEL = "8.2.0-dev";
+  private static final String MAIN_LABEL = "main";
 
   // This field is accessed from release scripts using simple pattern matching.
   // Therefore, changing this field could break our release scripts.