fixed script for creating merged PR list

Author: wsafonov

listMergedPRs.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 
-LAST_NIGHTLY_TAG=$(git tag -l nightly-* | head -1)
+LAST_NIGHTLY_TAG=$(git tag -l nightly-* | tail -1)
 git log --merges --first-parent master --oneline $LAST_NIGHTLY_TAG^..HEAD