update the alias plugin to 0.9.0

Author: Alexander Pann

build.gradle

@@ -18,7 +18,7 @@ python.pip 'mkdocs-macros-plugin:1.0.1'
 python.pip 'autolink-references-mkdocs-plugin:0.2.1'
 python.pip 'mkdocs-glightbox:0.3.4'
 python.pip 'mkdocs-gen-files:0.5.0'
-python.pip 'mkdocs-alias-plugin:0.6.0'
+python.pip 'mkdocs-alias-plugin:0.9.0'
 python.pip 'mkdocs-webcontext-plugin:0.1.0'
 python.pip 'mkdocs-redirects:1.2.0'
 python.pip 'mkdocs-link-marker:0.1.2'