Hard-wire the year into the metadata test

The problem with the previous use of now.year is that this causes the
tests to break on an annual basis.

tests/data/refs/sis__a5edb157d83690e326cc296b667da0ad.out → tests/data/refs/sis__e30840d5fbad4e04904f7192058a039c.out

@@ -6,7 +6,7 @@
       <cc:Work rdf:about="">
         <dc:format>image/svg+xml</dc:format>
         <dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/>
-      <dc:title>This, Too, is Not a Pipe</dc:title><dc:date>2023-03-31T22:14:00</dc:date><dc:creator><cc:Agent><dc:title>John Doe</dc:title></cc:Agent></dc:creator><dc:rights><cc:Agent><dc:title>Copyright (C) 2023 John Doe</dc:title></cc:Agent></dc:rights><dc:publisher><cc:Agent><dc:title>Awesome Artwork, Inc.</dc:title></cc:Agent></dc:publisher><dc:identifier>10.5555/12345678</dc:identifier><dc:source>https://collections.lacma.org/node/239578</dc:source><dc:relation>isVersionOf "La Trahison des Images"</dc:relation><dc:language>fr.BE</dc:language><dc:subject><rdf:Bag><rdf:li>tobacco pipe</rdf:li><rdf:li>painting</rdf:li><rdf:li>cursive writing</rdf:li></rdf:Bag></dc:subject><dc:coverage>Lessines, Belgium</dc:coverage><dc:description>Painting of a tobacco pipe on a solid background with the French phrase, "Ce n'est pas non plus un tuyau" handwritten beneath it</dc:description><dc:contributor><cc:Agent><dc:title>Fred Nerk</dc:title></cc:Agent></dc:contributor><cc:license rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/"/></cc:Work>
+      <dc:title>This, Too, is Not a Pipe</dc:title><dc:date>2024-01-09T22:02:00</dc:date><dc:creator><cc:Agent><dc:title>John Doe</dc:title></cc:Agent></dc:creator><dc:rights><cc:Agent><dc:title>Copyright (C) 2024 John Doe</dc:title></cc:Agent></dc:rights><dc:publisher><cc:Agent><dc:title>Awesome Artwork, Inc.</dc:title></cc:Agent></dc:publisher><dc:identifier>10.5555/12345678</dc:identifier><dc:source>https://collections.lacma.org/node/239578</dc:source><dc:relation>isVersionOf "La Trahison des Images"</dc:relation><dc:language>fr.BE</dc:language><dc:subject><rdf:Bag><rdf:li>tobacco pipe</rdf:li><rdf:li>painting</rdf:li><rdf:li>cursive writing</rdf:li></rdf:Bag></dc:subject><dc:coverage>Lessines, Belgium</dc:coverage><dc:description>Painting of a tobacco pipe on a solid background with the French phrase, "Ce n'est pas non plus un tuyau" handwritten beneath it</dc:description><dc:contributor><cc:Agent><dc:title>Fred Nerk</dc:title></cc:Agent></dc:contributor><cc:license rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/"/></cc:Work>
     <cc:License rdf:about="http://creativecommons.org/licenses/by-sa/4.0/"><cc:permits rdf:resource="http://creativecommons.org/ns#Reproduction"/><cc:permits rdf:resource="http://creativecommons.org/ns#Distribution"/><cc:permits rdf:resource="http://creativecommons.org/ns#DerivativeWorks"/><cc:requires rdf:resource="http://creativecommons.org/ns#Notice"/><cc:requires rdf:resource="http://creativecommons.org/ns#Attribution"/><cc:requires rdf:resource="http://creativecommons.org/ns#ShareAlike"/></cc:License></rdf:RDF>
   </metadata>
   <g inkscape:label="Layer 1" inkscape:groupmode="layer" id="layer1"/>

tests/test_simple_inkscape_scripting.py

@@ -476,9 +476,9 @@ class SimpInkScrTestMetadata(CustomComparisonMixin,
 
 now = datetime.datetime.now()
 metadata.title = 'This, Too, is Not a Pipe'
-metadata.date = datetime.datetime(2023, 3, 31, 22, 14)
+metadata.date = datetime.datetime(2024, 1, 9, 22, 2)
 metadata.creator = 'John Doe'
-metadata.rights = 'Copyright (C) %d John Doe' % now.year
+metadata.rights = 'Copyright (C) 2024 John Doe'
 metadata.publisher = 'Awesome Artwork, Inc.'
 metadata.identifier = '10.5555/12345678'
 metadata.source = 'https://collections.lacma.org/node/239578'