Fix capitalization, code formatting.
Fix capitalization, code formatting.

Unescaped `<` and `>` within Markdown are processed as HTML so text like
`<username>` which is meant to be a placeholder instead is hidden, because
`<username>` is not a valid HTML tag and hence is ignored by the browser.

Instead, we need to format it as code to make it visible.

joshlong/gcp-service-broker,rifung/gcp-service-broker,GoogleCloudPlatform/gcp-service-broker,rifung/gcp-service-broker,GoogleCloudPlatform/gcp-service-broker,rifung/gcp-service-broker,rifung/gcp-service-broker,joshlong/gcp-service-broker