Rename genrule for combined proguard in maven.bzl

This avoids naming conflict with the output file: "WARNING: /tmpfs/src/dagger-opensource/java/dagger/hilt/android/BUILD:122:19: target 'artifact-proguard.txt' is both a rule and a file; please choose another name for the rule"

RELNOTES=N/A
PiperOrigin-RevId: 346572106
diff --git a/tools/maven.bzl b/tools/maven.bzl
index c79001d..2c648a2 100644
--- a/tools/maven.bzl
+++ b/tools/maven.bzl
@@ -188,7 +188,7 @@
         if proguard_specs:
             # Concatenate all proguard rules since an aar only contains a single proguard.txt
             native.genrule(
-                name = name + "-proguard.txt",
+                name = name + "-proguard",
                 srcs = proguard_specs,
                 outs = [name + "-proguard.txt"],
                 cmd = "cat $(SRCS) > $@",
@@ -337,7 +337,7 @@
     """A very, very simple Android Library (aar) packaging rule.
 
     This rule only support packaging simple android libraries. No resources
-    support, assets, extra libs, jni, nor proguard. This rule is needed because
+    support, assets, extra libs, nor jni. This rule is needed because
     there is no 'JarJar equivalent' for AARs and some of our artifacts are
     composed of sources spread across multiple android_library targets.