Ruby: fix extractor pack script after workspace root change

Author: Paolo Tranquilli

ruby/scripts/create-extractor-pack.sh

@@ -8,10 +8,12 @@ else
   echo "Unknown OS"
   exit 1
 fi
+cd "$(dirname "$0")/.."
 
 (cd extractor && cargo build --release)
 
-BIN_DIR=extractor/target/release
+# we are in a cargo workspace rooted at the git checkout
+BIN_DIR=../target/release
 "$BIN_DIR/codeql-extractor-ruby" generate --dbscheme ql/lib/ruby.dbscheme --library ql/lib/codeql/ruby/ast/internal/TreeSitter.qll
 
 codeql query format -i ql/lib/codeql/ruby/ast/internal/TreeSitter.qll