roll: clang

From: git_revision:1aa59ff2f789776ebfa2d4b315fd3ea589652b4a
To: git_revision:3a20597776a5d2920e511d81653b4d2b6ca0c855

Bug: b/239856986
Change-Id: I887121b32febdb4422bbc6d1bc2b42a8f2d5da64
Build-Errors: continue
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/111130
Reviewed-by: Wyatt Hepler <hepler@google.com>
Reviewed-by: Petr Hosek <phosek@google.com>
Commit-Queue: Prabhu Karthikeyan Rajasekaran <prabhukr@google.com>
diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
index ffbc748..69eca43 100644
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
@@ -69,7 +69,7 @@
         "windows-amd64"
       ],
       "tags": [
-        "git_revision:1aa59ff2f789776ebfa2d4b315fd3ea589652b4a"
+        "git_revision:3a20597776a5d2920e511d81653b4d2b6ca0c855"
       ],
       "version_file": ".versions/clang.cipd_version"
     },