[MacPorts] #58867: bazel*: rename variant to bash_completion

[MacPorts]

#58867: bazel*: rename variant to bash_completion
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  Reporter:  blair   |      Owner:  cjones051073
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  bazel   |
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Comment (by cjones051073):

 yep fine by me.

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Ticket URL: <https://trac.macports.org/ticket/58867#comment:4>
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