[charts/gateway]: incremented gw chart version

[SatishKoney-BRCM]

Description of the change

incremented gw chart version since chart.yaml has changed

Benefits

Drawbacks

Applicable issues

• fixes #

Additional information

Checklist

• [X] Chart version bumped in Chart.yaml according to semver.
• [] Variables are documented in the README.md
• [] Title of the PR starts with chart name (e.g. [charts/gateway])
• [] If the chart contains a values-production.yaml apart from values.yaml, ensure that you implement the changes in both files