Bump jdpurcell/install-qt-action from 4 to 5

Bumps [jdpurcell/install-qt-action](https://github.com/jdpurcell/install-qt-action) from 4 to 5.
- [Commits](jdpurcell/install-qt-action@v4...v5)

---
updated-dependencies:
- dependency-name: jdpurcell/install-qt-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -90,7 +90,7 @@ jobs:
         # \todo Revert to only using jurplel's action when issue #248 is resolved.
         # \todo See https://github.com/jurplel/install-qt-action/issues/248
         if: contains(matrix.qt, '.') && matrix.arch == 'arm64' # ie if not using Ubuntu's Qt5/Qt6.
-        uses: jdpurcell/install-qt-action@v4
+        uses: jdpurcell/install-qt-action@v5
         with:
           version: ${{ matrix.qt }}
           modules: ${{ startsWith(matrix.qt, '6') && 'qtconnectivity' || '' }}