8315062: [GHA] get-bootjdk action should return the abolute path

Backport-of: 99ea8bf2b962011e57d02a93217d65d7259e8f80

Author: shipilev

.github/actions/get-bootjdk/action.yml

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -104,6 +104,6 @@ runs:
     - name: 'Export path to where BootJDK is installed'
       id: path-name
       run: |
-        # Export the path
-        echo 'path=bootjdk/jdk' >> $GITHUB_OUTPUT
+        # Export the absolute path
+        echo "path=`pwd`/bootjdk/jdk" >> $GITHUB_OUTPUT
       shell: bash