Fix character set

code/html/index.html

@@ -133,7 +133,7 @@
 
                     <div class="footer">
                         &copy; 2016-2017<br />
-                        Xose P�rez<br/>
+                        Xose Pérez<br/>
                         <a href="http://tinkerman.cat" target="_blank">http://tinkerman.cat</a><br/>
                         <a href="https://bitbucket.org/xoseperez/espurna" target="_blank">ESPurna @ Bitbucket</a><br/>
                         GPLv3 license<br/>
@@ -415,8 +415,8 @@
 
                                 <div class="pure-g module module-ds module-dht">
                                     <label class="pure-u-1 pure-u-sm-1-4" for="tmpUnits">Temperature units</label>
-                                    <div class="pure-u-1 pure-u-sm-1-4"><input type="radio" name="tmpUnits" tabindex="12" value="0"> Celsius (�C)</input></div>
-                                    <div class="pure-u-1 pure-u-sm-1-4"><input type="radio" name="tmpUnits" tabindex="13" value="1"> Fahrenheit (�F)</input></div>
+                                    <div class="pure-u-1 pure-u-sm-1-4"><input type="radio" name="tmpUnits" tabindex="12" value="0"> Celsius (&deg;C)</input></div>
+                                    <div class="pure-u-1 pure-u-sm-1-4"><input type="radio" name="tmpUnits" tabindex="13" value="1"> Fahrenheit (&deg;F)</input></div>
                                 </div>
 
                                 <div class="pure-g">