Updated labeler GitHub action configuration to v5 format

When merging #2917 I overlooked the note that the configuration file
format had changed.

.github/labeler.yml

@@ -6,11 +6,8 @@
 # Note that we enable dot, so "**" matches all files in a folder
 
 Z-BenchCI:
- - kani-compiler/**
- - rust-toolchain.toml
- - kani-dependencies
- - kani-driver/src/call-*
- - Cargo.lock
- - cprover_bindings/**
- - library/**
-
+- any:
+ - changed-files:
+ - any-glob-to-any-file: ['kani-compiler/**', 'kani-driver/src/call-*', 'cprover_bindings/**', 'library/**']
+ - any-glob-to-any-file: ['rust-toolchain.toml', 'Cargo.lock']
+ - any-glob-to-any-file: ['kani-dependencies']