Update manage-targets.mdx (#1376)

Fixed typo (equivalient -> equivalent)

website/content/docs/common-workflows/manage-targets.mdx

@@ -84,7 +84,7 @@ resource "boundary_host" "postgres" {
 
 ## Define a Host Set
 
-Host sets allow us to group hosts providing equivalient services together. A target works off of host sets, so even though we are only defining one host in this example, we're going to create a host set of one host.
+Host sets allow us to group hosts providing equivalent services together. A target works off of host sets, so even though we are only defining one host in this example, we're going to create a host set of one host.
 
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