feat(ci): Bump TheRock hash to b8ad2e (2026-06-30) (ROCm#8972)

Bump TheRock hash to b8ad2e (2026-06-30)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: geomin12

.github/actions/ci-env/action.yml

@@ -4,7 +4,7 @@ description: "Single source of truth for shared CI constants (TheRock ref, Docke
 outputs:
   therock-ref:
     description: "TheRock commit hash to use"
-    value: "df6bda522056ac30784cf5aafc8479e821177b30" # 2026-06-24
+    value: "b8ad2e834102e978c23b099bfb7066fc04f01b0c" # 2026-06-30
   docker-image:
     description: "Docker container image for Linux builds"
     value: "ghcr.io/rocm/therock_build_manylinux_x86_64@sha256:48492540591673fdc8d51beb89bde41e7ba13cbb528f643c0a481ba42c4058f2"