Fix version when running as bzlmod module (#274)

Author: jmthvt

cli/src/main/kotlin/com/bazel_diff/cli/VersionProvider.kt

@@ -9,7 +9,8 @@ class VersionProvider : IVersionProvider {
     val classLoader = this::class.java.classLoader
     val inputStream =
         classLoader.getResourceAsStream("cli/version")
-            ?: throw IllegalArgumentException(
+            ?: classLoader.getResourceAsStream("version")
+              ?: throw IllegalArgumentException(
                 "unknown version as version file not found in resources")
 
     val version = BufferedReader(InputStreamReader(inputStream)).use { it.readText().trim() }