[card_binary_sensor] bugfix force_background_color

[shogun160]

Remove template "blue" to make ulm_card_binary_sensor_force_background_color work

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• I have followed the contribution guidelines
  • This PR is for a custom-card or documentation change and therefore directed to the main branch.
  • This PR is for a official card or any other directly to the integration related change and therefore directed to the release branch.

[basbruss]

Good catch. Thought I had already omitted all those color_templates but apparently I have missed one 😄