Fixes https://github.com/chatwoot/chatwoot/issues/13257
When sending WhatsApp template messages via API with `processed_params`,
users receiving error `(#132000) Number of parameters does not match the
expected number of params` from WhatsApp. The find template method
performed case-sensitive string comparison on language codes. If a user
sent `language: "ES"` but the template was stored as `language: "es"`,
the template wouldn't be found, resulting in empty `components: []`
being sent to WhatsApp.