"package_name" can be set as desired when submitting a Pentest Opportunity form

**Summary:** Hello Team, While filling up the Pentest Opportunity form, the mutation `AutoSavePentestOpportunity` allowed me to set value to `package_name` (i.e =="package_name": "premium_p80"==) which should be done only by ***the internal reviewing staff*** upon submitting the form.

mutation AutosavePentestOpportunity($input: AutosavePentestOpportunityInput!) {
  autosavePentestOpportunity(input: $input) {
    was_successful
    errors(first: 100) {
      edges {
        node {
          id
          type
          field
          message
          __typename
        } …