Update coyright.html to not include the html tags.

I think it is a mistake to include a tags.

Note that with the exception of the `©`, the two translate blocks are
almost identical, so I would also be for including the © inside the html
copyright to have the same translatable strings.

Closes #1873

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/copyright.html

@@ -2,7 +2,7 @@
 {% if show_copyright and copyright %}
   <p class="copyright">
     {% if hasdoc('copyright') %}
-      {% trans path=pathto('copyright'), copyright=copyright|e %}© <a href="{{ path }}">Copyright</a> {{ copyright }}.{% endtrans %}
+      © <a href="{{ pathto('copyright') }}">{% trans copyright=copyright|e %}Copyright {{ copyright }}{% endtrans %}</a>.
       <br/>
     {% else %}
       {% trans copyright=copyright|e %}© Copyright {{ copyright }}.{% endtrans %}