revert: "ci(windows): pin gcovr to < 8.0" (#3283)

Revert "ci(windows): pin gcovr to < 8.0 (#3277)"

This reverts commit d3ad636.

.github/workflows/CI.yml

@@ -1184,7 +1184,7 @@ jobs:
         shell: msys2 {0}
         working-directory: build
         run: |
-          ${{ steps.python-path.outputs.python-path }} -m pip install "gcovr<8.0"
+          ${{ steps.python-path.outputs.python-path }} -m pip install gcovr
           ${{ steps.python-path.outputs.python-path }} -m gcovr . -r ../src \
             --exclude-noncode-lines \
             --exclude-throw-branches \