Invalid environment spec

[Mena2871]

Fission/Kubernetes version

$ fission --version
client:
  fission/core:
    BuildDate: "2021-06-16T10:24:16Z"
    GitCommit: 6fbd4878be785ded8f14eb9f8b8bc747946a2b8f
    Version: 1.13.0
server:
  fission/core:
    BuildDate: "2021-06-16T09:47:41Z"
    GitCommit: 6fbd4878be785ded8f14eb9f8b8bc747946a2b8f
    Version: 1.13.0

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.2", GitCommit:"52c56ce7a8272c798dbc29846288d7cd9fbae032", GitTreeState:"clean", BuildDate:"2020-04-17T08:59:10Z", GoVersion:"go1.14.2", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.5", GitCommit:"e0fccafd69541e3750d460ba0f9743b90336f24f", GitTreeState:"clean", BuildDate:"2020-04-16T11:35:47Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}

Kubernetes platform (e.g. Google Kubernetes Engine)
AWS EC2 deployed cluster

Describe the bug
Fission-workflows is throwing an error attempting to validate environment spec

To Reproduce

Deploy fission-workflows 0.6.0 using README.

helm install --wait -n fission-workflows fission-charts/fission-workflows --version 0.6.0. 

Expected result
fission-workflows installed on top of fission

Actual result
helm install is throwing the error below:

Screenshots/Dump file

Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(Environment.spec): unknown field "TerminationGracePeriodSeconds" in io.fission.v1.Environment.spec

Additional context
Changing TerminationGracePeriod to terminationGracePeriod in charts/fission-workflows/templates/deployment.yaml fixed the issue