Fix documentation for building dart sdk on android

Closes #60883

GitOrigin-RevId: c1f0bf5
Change-Id: If6339c1c1806a567485d3b44d5ed36043a97080a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433920
Commit-Queue: Alexander Thomas <[email protected]>
Reviewed-by: Ivan Inozemtsev <[email protected]>
Reviewed-by: Alexander Thomas <[email protected]>

Author: charafau

docs/Building-Dart-SDK-for-ARM-or-RISC-V.md

@@ -21,7 +21,7 @@ $ sudo apt-get install g++-riscv64-linux-gnu    # To target riscv64
 
 ## Android
 
-Follow instructions under ["One-time Setup" under Android](Building-the-Dart-VM-for-Android)
+Follow instructions under ["One-time Setup" under Android](https://github.com/dart-lang/sdk/blob/main/docs/Building-the-Dart-VM-for-Android.md)
 
 # Building