add cache disclaimer and htaccess

.htaccess

@@ -0,0 +1,5 @@
+<IfModule mod_headers.c>
+    Header set Cache-Control "no-cache, no-store, must-revalidate"
+    Header set Pragma "no-cache"
+    Header set Expires 0
+</IfModule>

index.html

@@ -29,6 +29,8 @@
 
     <br>
 
+    <p><b>If the tool does not work, please clear your cache and/or reload the webpages!</b> I am continuously updating this tool, but the changes might not load in your browser unless you clear your cache.</p>
+
     <h3>What is this?</h3>
     <p>This website allows you to create configuration profiles for your Apple device to use the new built-in encrypted
         DNS options.</p>