Update index.md

Removed duplicate "a"

docs/cloud-adoption-guide/index.md

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 The cloud presents a fundamental shift in the way that enterprises procure and utilize technology resources. In the past, enterprises assumed ownership and responsibility of all levels of technology from infrastructure to software. Now, the cloud offers the potential to transform the way enterprises utilize technology by provisioning and consuming resources as needed.
 
-While the cloud offers nearly unlimited flexibility in terms of design choices, enterprises seek proven and consistent methodology for the adoption of cloud technologies. And, each enterprise has different goals and timelines for cloud adoption, making a a one-size-fits-all approach to adoption nearly impossible.
+While the cloud offers nearly unlimited flexibility in terms of design choices, enterprises seek proven and consistent methodology for the adoption of cloud technologies. And, each enterprise has different goals and timelines for cloud adoption, making a one-size-fits-all approach to adoption nearly impossible.
 
 The process of adopting cloud technologies is not a linear process, and this is especially true for large enterprises with many different teams. Some teams may be responsible for a large set of existing workloads and have a requirement to modernize them by adding cloud technologies or migrating them completely. Other teams may have the opportunity to innovate by beginning new development from scratch in the cloud. Yet other teams may not be ready to adopt cloud technologies in production but are ready to learn about and experiment with the cloud.
 
@@ -33,4 +33,4 @@ The audience for the Azure Cloud Adoption Guide includes Enterprise Administrato
 
 ## Next steps
 
-* If you are new to Azure, start with the [foundational Azure adoption](adoption-intro/overview.md) section of this guide.
+* If you are new to Azure, start with the [foundational Azure adoption](adoption-intro/overview.md) section of this guide.