WOPI Bridge: add wbsecret support to the chart

[SamuAlfageme]

Contributing a Chart / update to an existing Chart

• [x] Run helm lint on the chart dir.
• [x] (Update) Bump the Chart.yaml version before merging, to release it as a new version.
• [x] (Update) If the PR includes new configurable parameters in the chart's values.yaml. Add documentation in the appropiate README.

[glpatcern]

Looks all good to me. Are you going to create a separate PR for the extra necessary env parameter for CodiMD, CMD_ALLOW_FREEURL ?

[SamuAlfageme]

@glpatcern yep, that one follows in the documentation: https://github.com/sciencemesh/sciencemesh/commit/1a92acdd9bb5335c93bdbb973717b59fff512cec