installation: sources: build-and-install : Very Minor grammar correction (#581)

Signed-off-by: Kishan B <kishancs46@gmail.com>

Author: kishaningithub

installation/sources/build-and-install.md

@@ -1,6 +1,6 @@
 # Build and Install
 
-[Fluent Bit](http://fluentbit.io) uses [CMake](http://cmake.org) as it build system. The suggested procedure to prepare the build system consists on the following steps:
+[Fluent Bit](http://fluentbit.io) uses [CMake](http://cmake.org) as it build system. The suggested procedure to prepare the build system consists of the following steps:
 
 ## Prepare environment