update go.mod for golang cve (#2968)

Signed-off-by: Cliff Colvin <ccolvin@kubecost.com>

core/go.mod

@@ -1,6 +1,6 @@
 module github.com/opencost/opencost/core
 
-go 1.22.0
+go 1.22.7
 
 require (
 	github.com/davecgh/go-spew v1.1.1

go.mod

@@ -195,6 +195,4 @@ require (
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
 )
 
-go 1.22.0
-
-toolchain go1.22.4
+go 1.22.7