Wizard: Update kernel argument validation regex

There are special characters missing from the validation regex.

src/Components/CreateImageWizard/validators.ts

@@ -122,7 +122,7 @@ export const isKernelNameValid = (kernelName: string) => {
 };
 
 export const isKernelArgumentValid = (arg: string) => {
-  return /^[a-zA-Z0-9=-_,."']*$/.test(arg);
+  return /^[a-zA-Z0-9=\-_,."'/:#+]*$/.test(arg);
 };
 
 export const isPortValid = (port: string) => {