github: workflows: bump lukka/get-cmake from 3.31.5 to 3.31.6

Bumps [lukka/get-cmake](https://github.com/lukka/get-cmake) from 3.31.5 to 3.31.6.
- [Release notes](https://github.com/lukka/get-cmake/releases)
- [Commits](lukka/get-cmake@5f6e04f...56d043d)

---
updated-dependencies:
- dependency-name: lukka/get-cmake
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci-aarch64.yml

@@ -95,7 +95,7 @@ jobs:
 
       # Note: This will create a github actions cache
       - name: Get latest CMake and Ninja
-        uses: lukka/get-cmake@5f6e04f5267c8133f1273bf2103583fc72c46b17 # v3.31.5
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
         with:
           cmakeVersion: 3.31.0
           ninjaVersion: 1.12.0

.github/workflows/nightly-aarch64.yml

@@ -58,7 +58,7 @@ jobs:
 
       # Note: This will create a github actions cache
       - name: Get latest CMake and Ninja
-        uses: lukka/get-cmake@5f6e04f5267c8133f1273bf2103583fc72c46b17 # v3.31.5
+        uses: lukka/get-cmake@56d043d188c3612951d8755da8f4b709ec951ad6 # v3.31.6
         with:
           cmakeVersion: 3.31.0
           ninjaVersion: 1.12.0