Merge pull request #11 from timokoch/patch-2

[contributing] Describe --> Acknowledgement

Author: ruohai0925

CONTRIBUTING.md

@@ -262,6 +262,6 @@ to be documented where appropriate. For example:
 Additional information regarding Doxygen comment formatting can be found
 in the [Doxygen Manual](https://www.doxygen.nl/manual/).
 
-### Describe
+### Acknowledgement
 
-The current CONTRIBUTING.md file is modified based on the [CONTRIBUTING.md](https://github.com/AMReX-Codes/amrex/blob/development/CONTRIBUTING.md). in the amrex project.
+The current CONTRIBUTING.md file is modified based on the [CONTRIBUTING.md](https://github.com/AMReX-Codes/amrex/blob/development/CONTRIBUTING.md) file of the amrex project.