fix: clarify hls option deprecation warning (#1257)

Fixes #1256

Author: gkatsev

src/videojs-http-streaming.js

@@ -508,7 +508,7 @@ class VhsHandler extends Component {
     super(tech, videojs.mergeOptions(options.hls, options.vhs));
 
     if (options.hls && Object.keys(options.hls).length) {
-      videojs.log.warn('Using hls options is deprecated. Use vhs instead.');
+      videojs.log.warn('Using hls options is deprecated. Please rename `hls` to `vhs` in your options object.');
     }
 
     // if a tech level `initialBandwidth` option was passed

test/videojs-http-streaming.test.js

@@ -416,7 +416,7 @@ QUnit.test('logs deprecation notice when using hls for options', function(assert
   assert.equal(this.env.log.warn.calls, 1, 'warning logged');
   assert.equal(
     this.env.log.warn.args[0][0],
-    'Using hls options is deprecated. Use vhs instead.'
+    'Using hls options is deprecated. Please rename `hls` to `vhs` in your options object.'
   );
 });
 
@@ -440,7 +440,7 @@ QUnit.test('logs deprecation notice when using hls for global options', function
   assert.equal(this.env.log.warn.calls, 1, 'warning logged');
   assert.equal(
     this.env.log.warn.args[0][0],
-    'Using hls options is deprecated. Use vhs instead.'
+    'Using hls options is deprecated. Please rename `hls` to `vhs` in your options object.'
   );
 
   videojs.options.hls = origHlsOptions;