code-scanning: update webhook example with new fields (#23571)

Co-authored-by: Thomas Horstmeyer <73262256+cannist@users.noreply.github.com>
Co-authored-by: Ethan Palm <56270045+ethanpalm@users.noreply.github.com>

Author: 3 people

lib/webhooks/static/dotcom/code_scanning_alert.reopened.payload.json

@@ -3,6 +3,7 @@
   "alert": {
     "number": 10,
     "created_at": "2020-07-22T14:06:31Z",
+    "updated_at": "2020-07-22T14:06:31Z",
     "url": "https://api.github.com/repos/Codertocat/Hello-World/code-scanning/alerts/10",
     "html_url": "https://github.com/Codertocat/Hello-World/security/code-scanning/10",
     "instances": [
@@ -14,13 +15,17 @@
       }
     ],
     "state": "open",
+    "fixed_at": null,
     "dismissed_by": null,
     "dismissed_at": null,
     "dismissed_reason": null,
     "rule": {
       "id": "Style/FrozenStringLiteralComment",
       "severity": "note",
-      "description": "Add the frozen_string_literal comment to the top of files to help transition to frozen string literals by default."
+      "description": "Add the frozen_string_literal comment to the top of files to help transition to frozen string literals by default.",
+      "full_description": "Add the frozen_string_literal comment to the top of files to help transition to frozen string literals by default.",
+      "tags": ["style"],
+      "help": "Enabled by default | Safe | Supports autocorrection | VersionAdded | VersionChanged\n--- | --- | --- | --- | ---\nEnabled | No | Yes (Unsafe) | 0.36 | 0.79\n\nThis cop is designed to help you transition from mutable string literals\nto frozen string literals.\nIt will add the comment `# frozen_string_literal: true` to the top of\nfiles to enable frozen string literals. Frozen string literals may be\ndefault in future Ruby. The comment will be added below a shebang and\nencoding comment. The frozen string literal comment is only valid in\nRuby 2.3+.\n\nNote that the cop will ignore files where the comment exists but is set\nto `false` instead of `true`.\n\n### Examples\n\n#### EnforcedStyle: always (default)\n\n```ruby\n# The `always` style will always add the frozen string literal comment\n# to a file, regardless of the Ruby version or if `freeze` or `<<` are\n# called on a string literal.\n# bad\nmodule Bar\n  # ...\nend\n\n# good\n# frozen_string_literal: true\n\nmodule Bar\n  # ...\nend\n\n# good\n# frozen_string_literal: false\n\nmodule Bar\n  # ...\nend\n```\n#### EnforcedStyle: never\n\n```ruby\n# The `never` will enforce that the frozen string literal comment does\n# not exist in a file.\n# bad\n# frozen_string_literal: true\n\nmodule Baz\n  # ...\nend\n\n# good\nmodule Baz\n  # ...\nend\n```\n#### EnforcedStyle: always_true\n\n```ruby\n# The `always_true` style enforces that the frozen string literal\n# comment is set to `true`. This is a stricter option than `always`\n# and forces projects to use frozen string literals.\n# bad\n# frozen_string_literal: false\n\nmodule Baz\n  # ...\nend\n\n# bad\nmodule Baz\n  # ...\nend\n\n# good\n# frozen_string_literal: true\n\nmodule Bar\n  # ...\nend\n```\n\n### Configurable attributes\n\nName | Default value | Configurable values\n--- | --- | ---\nEnforcedStyle | `always` | `always`, `always_true`, `never`\n\n"
     },
     "tool": {
       "name": "Rubocop",