Merge pull request #8286 from The-OpenROAD-Project-staging/bzl-versions

Bump bazel's toolchains_llvm to 1.5.0 and llvm_version to 20.1.8

Author: maliberty

MODULE.bazel

@@ -110,12 +110,12 @@ bazel_dep(name = "googletest", version = "1.16.0", dev_dependency = True)
 bazel_dep(name = "glpk", version = "5.0.bcr.3", repo_name = "org_gnu_glpk")
 
 ## Fix the compiler version and avoid any local compiler
-bazel_dep(name = "toolchains_llvm", version = "1.4.0")
+bazel_dep(name = "toolchains_llvm", version = "1.5.0")
 
 # Configure and register the toolchain.
 llvm = use_extension("@toolchains_llvm//toolchain/extensions:llvm.bzl", "llvm")
 llvm.toolchain(
-    llvm_version = "20.1.2",
+    llvm_version = "20.1.8",
 )
 use_repo(llvm, "llvm_toolchain")
 # use_repo(llvm, "llvm_toolchain_llvm") # if you depend on specific tools in scripts