Merge pull request #63 from arangodb-managed/OAS-4755.fix.6

OAS-4755 | fix shell script

Author: adoi

sign.sh

@@ -6,5 +6,5 @@ gpg-agent --daemon --default-cache-ttl 7200
 echo "$GPG_PRIVATE_KEY_BASE64" | base64 -d | gpg --import --batch --no-tty
 echo "hello world" > temp.txt
 gpg --detach-sig --yes -v --output=/dev/null --pinentry-mode loopback --passphrase "${PASSPHRASE}" temp.txt
-cd assets ; gpg --detach-sign ${PROJECT}-${VERSION}_SHA256SUMS
+cd assets ; gpg --detach-sign ${PROJECT}_${VERSION}_SHA256SUMS
 rm ../temp.txt