Make sure to note porting access wideners (FabricMC#566)

* Make sure to note porting access wideners

* Update index.md

* Update index.md

* Update develop/porting/index.md

Author: cassiancc

develop/porting/index.md

@@ -36,9 +36,10 @@ Start by updating your mod's `gradle/wrapper/gradle-wrapper.properties`, `gradle
 5. Replace any instances of `modImplementation` or `modCompileOnly` with `implementation` and `compileOnly`.
 6. Remove or replace any mods made for versions before 26.1 with versions compatible with this update.
    - No existing mods for 1.21.11 or older versions of Minecraft will work on 26.1, even as a compile-only dependency.
-7. Set Java compatibility to 25 instead of 21.
-8. Replace any mentions of `remapJar` with `jar`.
-9. Refresh Gradle by using the refresh button in the top-right corner of IntelliJ IDEA. If this button is not visible, you can force caches to be cleared by running `./gradlew --refresh-dependencies`.
+7. If needed, update the header of your [access widener or class tweaker](../class-tweakers/) to replace `named` with `official`.
+8. Set Java compatibility to 25 instead of 21.
+9. Replace any mentions of `remapJar` with `jar`.
+10. Refresh Gradle by using the refresh button in the top-right corner of IntelliJ IDEA. If this button is not visible, you can force caches to be cleared by running `./gradlew --refresh-dependencies`.
 
 ## Updating the Code {#porting-guides}