Add v21.3 release notes

docs/app_changes.md

@@ -1,5 +1,10 @@
 # Magisk Manager Changelog
 
+### v8.0.5
+
+- Minor UI changes
+- Update internal scripts
+
 ### v8.0.4
 
 - A lot of stability changes and minor bug fixes

docs/changes.md

@@ -1,5 +1,11 @@
 # Magisk Changelog
 
+### v21.3
+
+- [MagiskInit] Avoid mounting `f2fs` userdata as it may result in kernel crashes. This shall fix a lot of bootloops
+- [MagiskBoot] Fix a minor header checksum bug for `DHTB` header and ASUS `blob` image formats
+- [MagiskHide] Allowing hiding isolated processes if the mount namespace is separated
+
 ### v21.2
 
 - [MagiskInit] Detect 2SI after mounting `system_root` on legacy SAR devices

docs/releases/21300.md

@@ -0,0 +1,11 @@
+## 2021.1.16 Magisk v21.3
+
+Happy 2021! v21.3 adds a workaround for devices with buggy F2FS Linux kernel drivers. This F2FS bug may cause bootloops on many devices. Checkout the full [v21.0 release notes](https://topjohnwu.github.io/Magisk/releases/21000.html) if coming from older releases.
+
+### v21.3
+
+- [MagiskInit] Avoid mounting `f2fs` userdata as it may result in kernel crashes. This shall fix a lot of bootloops
+- [MagiskBoot] Fix a minor header checksum bug for `DHTB` header and ASUS `blob` image formats
+- [MagiskHide] Allowing hiding isolated processes if the mount namespace is separated
+
+### Full Changelog: [here](https://topjohnwu.github.io/Magisk/changes.html)

docs/releases/index.md

@@ -1,5 +1,6 @@
 # Release Notes
 
+- [v21.3](21300.md)
 - [v21.2](21200.md)
 - [v21.1](21100.md)
 - [v21.0](21000.md)