conf.py: Bump release to v1.0.0-rc2

Signed-off-by: Pavel Zhukov <pavel.zhukov@huawei.com>

conf.py

@@ -25,7 +25,7 @@ project = 'Oniro Project'
 copyright = '2021'
 author = 'Oniro Project'
 
-version = '1.0.0-rc'
+version = '1.0.0-rc2'
 release = version
 
 # -- General configuration ---------------------------------------------------