Prepare for rc-2.
diff --git a/assembly-release/sign-release.sh b/assembly-release/sign-release.sh
index d32d8ab..fa5a7e9 100755
--- a/assembly-release/sign-release.sh
+++ b/assembly-release/sign-release.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-export rcstring=""
+export rcstring="-rc-2"
 export vstring="5.2.3"
 
 # for rc releases we rename the release files