[MacPorts] #42298: librsvg: update to version 2.40.1

[MacPorts]

#42298: librsvg: update to version 2.40.1
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  Reporter:  devans@…  |      Owner:  pixilla@…
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.2.1
Resolution:            |   Keywords:  haspatch
      Port:  librsvg   |
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Changes (by devans@…):

 * keywords:   => haspatch


Old description:

> Current port version is 2.36.4.

New description:

 Current port version is 2.36.4. Patch attached.

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Ticket URL: <https://trac.macports.org/ticket/42298#comment:4>
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