Bump lukka/get-cmake from 4.4.5 to 4.5.0

get-cmake 4.4.5 does not know CMake 4.5.0, so the ci_module_cpp20 jobs
that request '^4.5.0' failed in the setup step. Bump every pin so all
jobs use the same action version.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

.github/workflows/windows.yml

@@ -90,7 +90,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
+        uses: lukka/get-cmake@16e8153a8b4918849d92aad131befe67a3705daa # v4.5.0
       - name: Set extra CXX_FLAGS for latest std_version
         # /wd5285 silences C5285 emitted by the bundled third-party doctest.h, which
         # specializes std::tuple (newly diagnosed by the VS2026 v145 toolset)
@@ -214,7 +214,7 @@ jobs:
           persist-credentials: false
       # The module test uses `import std;`, which needs CMake 4.5 or newer.
       - name: Get CMake 4.5+ and ninja
-        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
+        uses: lukka/get-cmake@16e8153a8b4918849d92aad131befe67a3705daa # v4.5.0
         with:
           cmakeVersion: '^4.5.0'
       # CMAKE_CXX_FLAGS replaces CMake's MSVC defaults (which include /EHsc), and