ci: Update LLVM/Clang to 15.0 in nightly CI jobs on Windows
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ca1437b..d4baba5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1000,7 +1000,7 @@
     variables:
         CMAKE_CI_JOB_NIGHTLY: "true"
 
-t:windows-clang13.0-cl-ninja:
+t:windows-clang15.0-cl-ninja:
     extends:
         - .windows_clang_ninja
         - .cmake_test_windows_external
@@ -1012,10 +1012,10 @@
     needs:
         - t:windows-vs2022-x64-ninja
     variables:
-        CMAKE_CI_BUILD_NAME: windows_clang13.0_cl_ninja
+        CMAKE_CI_BUILD_NAME: windows_clang15.0_cl_ninja
         CMAKE_CI_JOB_NIGHTLY: "true"
 
-t:windows-clang13.0-cl-nmake:
+t:windows-clang15.0-cl-nmake:
     extends:
         - .windows_clang_nmake
         - .cmake_test_windows_external
@@ -1027,10 +1027,10 @@
     needs:
         - t:windows-vs2022-x64-ninja
     variables:
-        CMAKE_CI_BUILD_NAME: windows_clang13.0_cl_nmake
+        CMAKE_CI_BUILD_NAME: windows_clang15.0_cl_nmake
         CMAKE_CI_JOB_NIGHTLY: "true"
 
-t:windows-clang13.0-gnu-ninja:
+t:windows-clang15.0-gnu-ninja:
     extends:
         - .windows_clang_ninja
         - .cmake_test_windows_external
@@ -1042,10 +1042,10 @@
     needs:
         - t:windows-vs2022-x64-ninja
     variables:
-        CMAKE_CI_BUILD_NAME: windows_clang13.0_gnu_ninja
+        CMAKE_CI_BUILD_NAME: windows_clang15.0_gnu_ninja
         CMAKE_CI_JOB_NIGHTLY: "true"
 
-t:windows-clang13.0-gnu-nmake:
+t:windows-clang15.0-gnu-nmake:
     extends:
         - .windows_clang_nmake
         - .cmake_test_windows_external
@@ -1057,7 +1057,7 @@
     needs:
         - t:windows-vs2022-x64-ninja
     variables:
-        CMAKE_CI_BUILD_NAME: windows_clang13.0_gnu_nmake
+        CMAKE_CI_BUILD_NAME: windows_clang15.0_gnu_nmake
         CMAKE_CI_JOB_NIGHTLY: "true"
 
 t:windows-msvc-v71-nmake: