fix document links (lower case -> upper case) (#63)

Fix the internal links to use upper-case names matching the files in the docs directory

README.md

@@ -8,15 +8,15 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 ### Mission
 
-The Beman Project’s [mission](docs/missionstatement.md) is to **support the efficient design and adoption of the highest quality C++ standard libraries** through implementation experience, user feedback, and technical expertise.
+The Beman Project’s [mission](docs/MISSION_STATEMENT.md) is to **support the efficient design and adoption of the highest quality C++ standard libraries** through implementation experience, user feedback, and technical expertise.
 
 ### Community
 
 We have two principle audiences: Library Developers and the C++ community.  We want to allow Library Developers to have a clear path on the road to Standardization.  And we want to make it easy for the C++ community to use these libraries to ensure we have real world usage.
 
 ### Governance
 
-This project is organized by our [Governance structure](docs/governance.md).
+This project is organized by our [Governance structure](docs/GOVERNANCE.md).
 
 ### Participating and contributing
 
@@ -28,7 +28,7 @@ If you are looking for ways to contribute code, see the open issues of [beman-pr
 contributors and usually have an assigned mentor. Don't hesitate to post on discourse with any questions.
 
 Please refer to our [code of conduct](/docs/CODE_OF_CONDUCT.md) and the
-[Beman standard](/docs/beman-standard.md) for further information about the community and
+[Beman standard](/docs/BEMAN_STANDARD.md) for further information about the community and
 development guidelines.
 
 ### FAQ

docs/CODE_OF_CONDUCT.md

@@ -127,7 +127,7 @@ any member of the conduct team directly.
 
 ## Conduct team
 
-The conduct team will be the Beman Project Leads as outlined in our [Governance Documents](governance.md).
+The conduct team will be the Beman Project Leads as outlined in our [Governance Documents](GOVERNANCE.md).
 
 ### Reporting conduct
 
@@ -215,7 +215,7 @@ confidential unless instructed otherwise by those individuals.
 
 Only permanent resolutions, such as bans, or requests for public actions may be
 appealed. To appeal a decision of the conduct team, contact the
-[Beman leads](governanace.md) with your appeal and
+[Beman leads](GOVERNANCE.md) with your appeal and
 they will review the case.
 
 In general, it is **not** appropriate to appeal a particular decision in public