URL percent-encoding in translations fail in babel

[return42]

URL encoding, officially known as percent-encoding in translated strings cause "Server error" when opening the preference page ..

...
  File "searx/templates/simple/preferences/method.html", line 14, in top-level template code
    {{- _('Change how forms are submitted, <a href="http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods" rel="external">learn more about request methods</a>') -}}
  File "py3/lib/python3.8/site-packages/jinja2/ext.py", line 167, in _gettext_alias
    return __context.call(__context.resolve("gettext"), *args, **kwargs)
  File "py3/lib/python3.8/site-packages/jinja2/ext.py", line 179, in gettext
    return rv % variables  # type: ignore
  File "/py3/lib/python3.8/site-packages/markupsafe/__init__.py", line 115, in __mod__
    return self.__class__(super().__mod__(arg))
ValueError: unsupported format character 'C' (0x43) at index 75

We have this issue with all UI languages that have a translation with a percentage URL:

• https://translate.codeberg.org/translate/searxng/searxng/ca/?&offset=151#translations

searxng/searx/templates/simple/preferences.html

Line 268 in d289a8b

<div class="description">{{ _('Change how forms are submitted, <a href="http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods" rel="external">learn more about request methods</a>') }}</div>