chore: style fixes from go fix (#10846)

Just `go fix ./...`

Signed-off-by: Jakob Borg <jakob@kastelo.net>

cmd/dev/stvanity/main.go

@@ -138,7 +138,7 @@ func printProgress(prefix string, count *atomic.Int64) {
 	}
 }
 
-func saveCert(priv interface{}, derBytes []byte) {
+func saveCert(priv any, derBytes []byte) {
 	certOut, err := os.Create("cert.pem")
 	if err != nil {
 		fmt.Println(err)
@@ -179,7 +179,7 @@ func saveCert(priv interface{}, derBytes []byte) {
 	}
 }
 
-func pemBlockForKey(priv interface{}) (*pem.Block, error) {
+func pemBlockForKey(priv any) (*pem.Block, error) {
 	switch k := priv.(type) {
 	case *rsa.PrivateKey:
 		return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}, nil