Fix governance ref in readme
No longer points to missing governance.md file, but to our governance repo
HARK is a toolkit for the structural modeling of economic choices of optimizing and non-optimizing heterogeneous agents. For more information on using HARK, see the [Econ-ARK Website](https://econ-ark.org).
-The Econ-ARK project uses an [open governance model](./GOVERNANCE.md) and is fiscally sponsored by [NumFOCUS](https://numfocus.org/). Consider making a [tax-deductible donation](https://numfocus.salsalabs.org/donate-to-econ-ark/index.html) to help the project pay for developer time, professional services, travel, workshops, and a variety of other needs.
+The Econ-ARK project uses an [open governance model](https://github.com/econ-ark/governance) and is fiscally sponsored by [NumFOCUS](https://numfocus.org/). Consider making a [tax-deductible donation](https://numfocus.salsalabs.org/donate-to-econ-ark/index.html) to help the project pay for developer time, professional services, travel, workshops, and a variety of other needs.
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<a href="https://numfocus.org/project/econ-ark">
