GitHub/Coin: Update LLVM/Clang to 18.1.7

Fixes: QTCREATORBUG-31045
Change-Id: Id70b3ac32a944c89763d095f5dcf6cd20849610d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

.github/workflows/build_cmake.yml

@@ -9,7 +9,7 @@ on:
 env:
   QT_VERSION: 6.7.1
   MACOS_DEPLOYMENT_TARGET: 11.0
-  CLANG_VERSION: 18.1.5
+  CLANG_VERSION: 18.1.7
   ELFUTILS_VERSION: 0.175
   CMAKE_VERSION: 3.21.1
   NINJA_VERSION: 1.10.2

coin/instructions/common_environment.yaml

@@ -7,7 +7,7 @@ instructions:
         variableValue: "RelWithDebInfo"
       - type: EnvironmentVariable
         variableName: LLVM_BASE_URL
-        variableValue: https://ci-files02-hki.ci.qt.io/packages/jenkins/qtcreator_libclang/libclang-release_18.1.5-based
+        variableValue: https://ci-files02-hki.ci.qt.io/packages/jenkins/qtcreator_libclang/libclang-release_18.1.7-based
       - type: EnvironmentVariable
         variableName: QTC_QT_BASE_URL
         variableValue: "https://ci-files02-hki.ci.qt.io/packages/jenkins/archive/qt/6.7/6.7.1-released/Qt"