Update readme.md

readme.md

@@ -90,6 +90,20 @@ This plugin is free but if you use it in a commercial project please consider to
 
 ![srcset editor block](https://raw.githubusercontent.com/bnomei/kirby3-srcset/master/kirby3-srcset-editor-block.png)
 
+**Specifically allow plugin block**
+ When you [specifically define](https://github.com/getkirby/editor/wiki/Blueprint-setup#allowed) which blocks are allowed in an editor field you need to add [the plugin block](https://github.com/bnomei/kirby3-srcset/blob/b700916bd5223629e9a022f6817c8fc1530415cc/src/index.js#L3) like this:
+
+ ```yaml
+ fields:
+  text:
+    label: Editor
+    type: editor
+    allowed: 
+      - h1
+      - paragraph
+      - srcset # matches name of plugin
+ ```
+
 ## Usage PHP
 
 ```php
@@ -184,7 +198,7 @@ By default the images ratio is hinted by the plugin to minimize reflows and avoi
 .lazysrcset-ratio {
     @apply relative;
     & > img {
-        @apply absolute pin-t pin-l w-full h-full block;
+        @apply absolute top-0 left-0 w-full h-full block;
         &:after {
             content: '';
             @apply block h-0 w-full;