## Description
Update the swagger `info.version` to `5.14.0` for tyk on the
`release-5.14.0` branch.

## Related Issue
TT-17417 (subtask of TT-17415, R3 release prep). Clone of the R2 work in
#8170 (TT-16944).

## Motivation and Context
The swagger version on `release-5.14.0` was stale (5.11.0). It must
reflect the 5.14.0 release before the docs sync copies the spec into
tyk-docs.

## How This Has Been Tested
- Verified the version string in `swagger.yml`.
- Ran `redocly lint swagger.yml --config=redocly.yml`
(@redocly/cli@1.33.0, matching CI). Validates cleanly.