fix typo (#252)

Author: marcom4rtinez

examples/README.md

@@ -2,7 +2,7 @@
 
 This directory contains examples that are mostly used for documentation, but can also be run/tested manually via the Terraform CLI.
 
-The document generation tool looks for files in the following locations by default. All other *.tf files besides the ones mentioned below are ignored by the documentation tool. This is useful for creating examples that can run and/or ar testable even if some parts are not relevant for the documentation.
+The document generation tool looks for files in the following locations by default. All other *.tf files besides the ones mentioned below are ignored by the documentation tool. This is useful for creating examples that can run and/or are testable even if some parts are not relevant for the documentation.
 
 * **provider/provider.tf** example file for the provider index page
 * **data-sources/`full data source name`/data-source.tf** example file for the named data source page