Merge #266: cmake, ci: Ignore -Wmaybe-uninitialized for GCC 11.4

d8c2692 fixup! ci: Test CMake edge cases (Hennadii Stepanov)

Pull request description:

  This PR adds `-Wno-error=maybe-uninitialized` for GCC 11.4.

  See: bitcoin#29720 (comment).

ACKs for top commit:
  m3dwards:
    ACK d8c2692

Tree-SHA512: 9c5b5ebf67a0fcc29288943b8f089f4e93bd6cd18e87f0d887cc3f7bc39a59a675ee526158f5c55a6788c9aaddeafa8f3365e436cdee245b8c71fb9f7805f6e0

.github/workflows/cmake.yml

@@ -231,7 +231,7 @@ jobs:
 
       - name: Generate build system
         run: |
-          cmake -B build --preset ci-linux -DBoost_INCLUDE_DIR="${PWD}/${{ matrix.conf.boost_archive }}"
+          cmake -B build --preset ci-linux -DBoost_INCLUDE_DIR="${PWD}/${{ matrix.conf.boost_archive }}" -DCMAKE_CXX_FLAGS="-Wno-error=maybe-uninitialized"
 
       - name: Build
         working-directory: build