fix typo in header

Author: crvernon

metarepo_template.md

@@ -44,7 +44,7 @@ Human, I.M. (2021). My output dataset name [Data set]. DataHub. https://doi.org/
 | model 2 | version | link to code repository | link to DOI dataset |
 | component 1 | version | link to code repository | link to DOI dataset |
 
-## Reproduce my experiement
+## Reproduce my experiment
 Fill in detailed info here or link to other documentation that is a thorough walkthrough of how to use what is in this repository to reproduce your experiment.