docs: normalise table headers

README.md

@@ -19,7 +19,7 @@ include:
 
 This job performs a static analysis of your shell scripts using [ShellCheck](https://github.com/koalaman/shellcheck).
 
-| Name                    | description                            | default value     |
+| Name                    | Description                            | Default value     |
 | ----------------------- | -------------------------------------- | ----------------- |
 | `BASH_SHELLCHECK_DISABLED` | Set to `true` to disable ShellCheck                                                | _none_ (enabled) |
 | `BASH_SHELLCHECK_IMAGE` | The Docker image used to run [ShellCheck](https://github.com/koalaman/shellcheck) | `registry.hub.docker.com/koalaman/shellcheck-alpine:stable` |
@@ -32,7 +32,7 @@ This job performs unit tests based on [Bats](https://bats-core.readthedocs.io/)
 
 The job uses the following variables:
 
-| Name                    | description                            | default value     |
+| Name                    | Description                            | Default value     |
 | ----------------------- | -------------------------------------- | ----------------- |
 | `BASH_BATS_ENABLED`     | Set to `true` to enable bats tests                                                    | _none_ (disabled) |
 | `BASH_BATS_IMAGE`       | The Docker image used to run [Bats](https://hub.docker.com/r/bats/bats) | `registry.hub.docker.com/bats/bats:latest` |