[MERGE #5776 @akshaythakare7] Uniformity in headers

Merge pull request #5776 from akshaythakare7:master

Changed the header links to plain headers as the links are already mentioned in following paragraphs.

Author: MikeHolman

README.md

@@ -8,7 +8,7 @@ ChakraCore is the core part of Chakra, the high-performance JavaScript engine th
 
 You can stay up-to-date on progress by following the [MSEdge developer blog](https://blogs.windows.com/msedgedev/).
 
-## [Build Status](https://github.com/Microsoft/ChakraCore/wiki/Build-Status)
+## Build Status
 
 |                               | __Debug__ | __Test__ | __Release__ |
 |:-----------------------------:|:---------:|:--------:|:-----------:|
@@ -93,7 +93,7 @@ If you believe you have found a security issue in ChakraCore, please share it wi
 * [Contribution guidelines](CONTRIBUTING.md)
 * [Blogs, talks and other resources](https://github.com/Microsoft/ChakraCore/wiki/Resources)
 
-## [Building ChakraCore](https://github.com/Microsoft/ChakraCore/wiki/Building-ChakraCore)
+## Building ChakraCore
 
 You can build ChakraCore on Windows 7 SP1 or above, and Windows Server 2008 R2 or above, with either Visual Studio 2015 or 2017 with C++ support installed.  Once you have Visual Studio installed:
 
@@ -117,7 +117,7 @@ Once built, you have a few options for how you can use ChakraCore:
 
 _A note about using ChakraCore_: ChakraCore is the foundational JavaScript engine, but it does not include the external APIs that make up the modern JavaScript development experience.  For example, DOM APIs like ```document.write()``` are additional APIs that are not available by default and would need to be provided.  For debugging, you may instead want to use ```print()```.
 
-## [Contribute](CONTRIBUTING.md)
+## Contribute
 
 Contributions to ChakraCore are welcome.  Here is how you can contribute to ChakraCore:
 
@@ -129,11 +129,11 @@ This project has adopted the [Microsoft Open Source Code of Conduct](https://ope
 
 Please refer to [Contribution Guidelines](CONTRIBUTING.md) for more details.
 
-## [License](https://github.com/Microsoft/ChakraCore/blob/master/LICENSE.txt)
+## License
 
 Code licensed under the [MIT License](https://github.com/Microsoft/ChakraCore/blob/master/LICENSE.txt).
 
-## [Roadmap](https://github.com/Microsoft/ChakraCore/wiki/Roadmap)
+## Roadmap
 
 For details on our planned features and future direction please refer to our [Roadmap](https://github.com/Microsoft/ChakraCore/wiki/Roadmap).