Update a repository deploy key

Update an existing deploy key in a repository.

The same key needs to be passed in but the comment and label can change.

Example:

$ curl -X PUT \
-H "Authorization <auth header>" \
-H "Content-type: application/json" \
https://api.bitbucket.org/2.0/repositories/mleu/test/deploy-keys/1234 -d \
'{
    "label": "newlabel",
    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDAK/b1cHHDr/TEV1JGQl+WjCwStKG6Bhrv0rFpEsYlyTBm1fzN0VOJJYn4ZOPCPJwqse6fGbXntEs+BbXiptR+++HycVgl65TMR0b5ul5AgwrVdZdT7qjCOCgaSV74/9xlHDK8oqgGnfA7ZoBBU+qpVyaloSjBdJfLtPY/xqj4yHnXKYzrtn/uFc4Kp9Tb7PUg9Io3qohSTGJGVHnsVblq/rToJG7L5xIo0OxK0SJSQ5vuId93ZuFZrCNMXj8JDHZeSEtjJzpRCBEXHxpOPhAcbm4MzULgkFHhAVgp4JbkrT99/wpvZ7r9AdkTg7HGqL3rlaDrEcWfL7Lu6TnhBdq5 newcomment",
}'