Postpone Bazel next change date (#34)

Delay dropping Bazel 6 from minimum support version to 11/2024 based on 6 months from *actual* date supported.

foundational-cxx-support-matrix.md

@@ -4,7 +4,7 @@
 |-----------------|------------------------|--------------|-------------|
 | C++ Version     | >= 14                  | 2022-07-01   | 2024-12-15  |
 | CMake           | >= 3.13                | 2023-06-01   | 2024-07-01 [^cmake] |
-| Bazel           | 6 LTS                  | 2023-04-18   | 2024-07-01  |
+| Bazel           | 6 LTS                  | 2023-04-18   | 2024-11-01  |
 | GCC             | >= 7.3.1               | 2022-07-01   | 2024-07-01 [^gcc] |
 | Clang           | >= 7.0.0               | 2023-06-01   | 2025-04-02 [^clang] |
 | MSVC            | >= 2022                | 2024-04-29   | 2027-01-12  |