Fix the link to build_mozc_for_android.md (#1192)

This follows up to my previous commit [1], which introduced

  docs/build_mozc_for_android.md

as a dedicated build instruction page for building libmozc.so for
Android as part of removing the dependency on Docker from our build
instructions (#1181).

This commit fixes the link to the above new page in README.md.

 [1]: f215eaf

PiperOrigin-RevId: 730872735

Author: yukawa

README.md

@@ -34,7 +34,7 @@ Detailed differences between Google Japanese Input and Mozc are described in [Ab
 Build Instructions
 ------------------
 
-* [How to build Mozc for Android](docs/build_mozc_for_docker.md): for Android library (`libmozc.so`)
+* [How to build Mozc for Android](docs/build_mozc_for_android.md): for Android library (`libmozc.so`)
 * [How to build Mozc for Linux](docs/build_mozc_in_docker.md): for Linux desktop
 * [How to build Mozc for macOS](docs/build_mozc_in_osx.md): for macOS build
 * [How to build Mozc for Windows](docs/build_mozc_in_windows.md): for Windows