Update learn/security.md

Co-authored-by: Erin Shaben <eshaben@icloud.com>

Author: ilariae

learn/security.md

@@ -76,7 +76,7 @@ In addition to the Global Accountant, Guardians may only sign transfers that do
 
 Wormhole builds in the open and is always open source.
 
-- **[Wormhole Core Repository](https://github.com/wormhole-foundation/wormhole){target=\_blank}**
+- **[Wormhole core repository](https://github.com/wormhole-foundation/wormhole){target=\_blank}**
 - **[Wormhole Foundation Github Organization](https://github.com/wormhole-foundation){target=\_blank}**
 - **[Wormhole contract deployments](#){target=\_blank}** <!-- link to core contracts page-->