Resolve vulnerability warnings by bumping Go to 1.24.13 (#938)

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Signed-off-by: Radoslav Dimitrov <radoslav@stacklok.com>

Author: rdimitrov

go.mod

@@ -1,6 +1,6 @@
 module github.com/modelcontextprotocol/registry
 
-go 1.24.12
+go 1.24.13
 
 require (
 	cloud.google.com/go/kms v1.25.0