tool/fast: use AWS instance for stable benchmarks

cmd/tools/fast/header.html

@@ -38,8 +38,11 @@ td {
 <h2>Is V still fast?</h2>
 
 Monitoring compilation speed for each commit. <br><br>
+Running on an AWS t2.micro instance (1 vCPU). <br><br>
 Source code: <a target=blank href='https://github.com/vlang/v/blob/master/cmd/tools/fast/fast.v'>fast.v</a> <br><br>
 
+
+
 <table>
 	<tr>
 		<td></td>