[web] Drop no longer needed PF/Spinner#isSVG prop

After its default value changed in the PatternFly 5.

See patternfly/patternfly-react#8183

Change made by https://github.com/patternfly/pf-codemods

web/src/components/network/WifiNetworkListItem.jsx

@@ -94,7 +94,7 @@ function WifiNetworkListItem ({ network, isSelected, isActive, onSelect, onCance
         />
         <div className="split">
           {/* TRANSLATORS: %s is replaced by a WiFi network name */}
-          {showSpinner && <Spinner isSVG size="md" aria-label={sprintf(_("%s connection is waiting for an state change"), network.ssid)} /> }
+          {showSpinner && <Spinner size="md" aria-label={sprintf(_("%s connection is waiting for an state change"), network.ssid)} /> }
           <Text component="small" className="keep-words">
             { showSpinner && !network.connection && _("Connecting") }
             { networkState(network.connection?.state)}