trimmed first sentence

by referencing slack's

docs/disclaimer.rst

@@ -1,23 +1,22 @@
 Disclaimer
 ==========
 
-The information and content in this document is provided for information and
-informational purposes only, and including, without limitation, any warranty of
-any kind, either express or implied, including, but not limited to, the implied
-warranties of merchantability, fitness for a particular purpose and
-non-infringement. AS IS. Lablup Inc. is not responsible for any damages
+The information and contents in this manual are provided on an "AS IS" and "AS AVAILABLE" basis for informational and reference purposes only, 
+without warranty of any kind, either express or implied, including, but not limited to, 
+the implied warranties of merchantability, fitness for a particular purpose, and non-infringement. 
+Lablup Inc. is not responsible for any damages
 resulting from the use of this manual, including consequential damages. Although
 much effort has been made to ensure the accuracy of the data provided, Lablup
 Inc. makes no representations, promises, or warranties with respect to the
-completeness, accuracy, up-to-date or adequacy of the information, and assumes
+completeness, accuracy, up-to-dateness or adequacy of the information, and assumes
 no responsibility for outdated information or errors. Lablup Inc. makes no
 representations or warranties, either expressed or implied, with respect to the
 accuracy or completeness of the information contained in this manual.
 
 Please contact us if you believe there are errors in this document that are
 different from the facts. We will review it as soon as possible.
 
-The product in this manual may subect to change without notice due to continued
+The product in this manual may subect to change without notice due to continuous
 development by open source community and Lablup Inc.
 
 All product and company names mentioned herein may be trademarks of their