chore(java): Bump com.uber.nullaway:nullaway from 0.12.15 to 0.13.0 (#3897)

Bumps the linters group in /java with 1 update:
[com.uber.nullaway:nullaway](https://github.com/uber/NullAway).

Updates `com.uber.nullaway:nullaway` from 0.12.15 to 0.13.0

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

java/pom.xml

@@ -307,7 +307,7 @@
                 <path>
                   <groupId>com.uber.nullaway</groupId>
                   <artifactId>nullaway</artifactId>
-                  <version>0.12.15</version>
+                  <version>0.13.0</version>
                 </path>
                 <path>
                   <groupId>org.checkerframework</groupId>