Update README.md for release 8.13.12 (#3007)

README.md

@@ -55,7 +55,7 @@ Cream Sandwich).
 The [Java demo](https://libphonenumber.appspot.com/) is updated with a slight
 delay after the GitHub release.
 
-Last demo update: v8.13.11.
+Last demo update: v8.13.12.
 
 Note: Eventhough the library (main branch/[maven release](https://repo1.maven.org/maven2/com/googlecode/libphonenumber/libphonenumber/8.12.56/))
 is at v8.12.57, because of some deployment issues, we were unable to update the
@@ -262,4 +262,4 @@ Alternatives to our own versions:
 
 Tools based on libphonenumber metadata:
 
-*   Scala: https://github.com/mr-tolmach/raf - library for generating valid phone numbers in the E.164 format
+*   Scala: https://github.com/mr-tolmach/raf - library for generating valid phone numbers in the E.164 format