Fix bad scape

Traceback (most recent call last):
  File "/usr/lib/python3.8/sre_parse.py", line 1039, in parse_template
    this = chr(ESCAPES[this][1])
KeyError: '\\s'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "adaptador.py", line 26, in <module>
    examples_utf8 = re.sub(r'%s' % inputregex, r'%s' % outputregex, examples_utf8)
  File "/usr/lib/python3.8/re.py", line 210, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "/usr/lib/python3.8/re.py", line 327, in _subx
    template = _compile_repl(template, pattern)
  File "/usr/lib/python3.8/re.py", line 318, in _compile_repl
    return sre_parse.parse_template(repl, pattern)
  File "/usr/lib/python3.8/sre_parse.py", line 1042, in parse_template
    raise s.error('bad escape %s' % this, len(this))
re.error: bad escape \s at position 2

replacements.xml

@@ -978,6 +978,6 @@
    </replacement>
    <replacement>
       <input><![CDATA[(\b|_)es desarà\b]]></input>
-      <output><![CDATA[\1\s'alçarà]]></output>
+      <output><![CDATA[\1s'alçarà]]></output>
    </replacement>
 </replacements>