Spelling fixes in action description (#7)

Fix typo 'iusses' -> 'issues'.  Also update 'prs' to 'pull requests'.

action.yml

@@ -6,24 +6,24 @@ inputs:
  description: 'Token for the repo. Can be passed in using {{ secrets.GITHUB_TOKEN }}'
  required: true
  stale-issue-message:
- description: 'The message to post on the issue when tagging it. If none provided, will not mark iusses stale.'
+ description: 'The message to post on the issue when tagging it. If none provided, will not mark issues stale.'
  stale-pr-message:
- description: 'The message to post on the pr when tagging it. If none provided, will not mark prs stale.'
+ description: 'The message to post on the pr when tagging it. If none provided, will not mark pull requests stale.'
  days-before-stale:
  description: 'The number of days old an issue can be before marking it stale'
  default: 60
  days-before-close:
- description: 'The number of days to wait to close an issue or pr after it being marked stale'
+ description: 'The number of days to wait to close an issue or pull request after it being marked stale'
  default: 7
  stale-issue-label:
  description: 'The label to apply when an issue is stale'
  default: 'Stale'
  stale-pr-label:
- description: 'The label to apply when a pr is stale'
+ description: 'The label to apply when a pull request is stale'
  default: 'Stale'
  operations-per-run:
  description: 'The maximum number of operations per run, used to control rate limiting'
  default: 30
 runs:
  using: 'node12'
- main: 'lib/main.js'
+ main: 'lib/main.js'