docs: Clarify licensing terms in README.md (#5214)

Updated licensing terms to clarify production use restrictions.

## Relevant issue(s)

Resolves #5213

Author: jsimnz

README.md

@@ -564,7 +564,7 @@ Instructions for the explorer can be found [here](./explorer/README.md).
 
 ## Licensing
 
-DefraDB's code is released under the [Business Source License (BSL)](licenses/BSL.txt). It grants you the right to copy, modify, create derivative works, redistribute, and make non-production use of it. For additional uses, such as deploying in production on a private network, please contact license@source.network for a licensing agreement. Each dated version of the license turns into the more permissive Apache License v2.0 after four years. Please read the complete license before usage.
+DefraDB's code is released under the [Business Source License (BSL)](licenses/BSL.txt). It grants you the right to copy, modify, create derivative works, redistribute, and make production and non-production use of it provided such use is not in connection with the operation or provision of a Managed Service. Each dated version of the license turns into the more permissive Apache License v2.0 after four years. Please read the complete [license](licenses/BSL.txt) before usage.
 
 ## Contributors