The pipe bitbucket-upload-file fails if the repository name consists of only numbers

Issue Summary

The pipe bitbucket-upload-file fails if the name of the repository you are uploading to consists of only numbers

Steps to Reproduce

1. Create a Bitbucket Cloud repo with a name that consists of only numbers, e.g. 123987
2. In a different repository (repo B), set up Pipelines and use the bitbucket-upload-file pipe to upload a file to the Downloads section of repo '123987' as follows:

   - pipe: atlassian/bitbucket-upload-file:0.3.2
      variables:
        BITBUCKET_USERNAME: $BITBUCKET_USERNAME
        BITBUCKET_APP_PASSWORD: $BITBUCKET_APP_PASSWORD
        FILENAME: 'sample.war'
        ACCOUNT: 'my-workspace'
        REPOSITORY: '123987'

3. Run a build in a repo B

Expected Results

The pipelines build succeeds and the file sample.war is uploaded in the Downloads section of repo the named 123987

Actual Results

The pipe command fails with the error:

✖ Validation errors: 
REPOSITORY:
- must be of string type

Workaround

The only workaround at the moment is to rename the repo named 123987 and add at least one letter or a dash in its name