removed old LTS version from testing. no critical issues, but will investigate

Author: chernser

.github/workflows/build.yml

@@ -452,7 +452,7 @@ jobs:
       matrix:
         # most recent LTS releases as well as latest stable builds
         # https://github.com/ClickHouse/ClickHouse/pulls?q=is%3Aopen+is%3Apr+label%3Arelease
-        clickhouse: ["23.8", "24.3", "24.8", "latest"]
+        clickhouse: ["24.3", "24.8", "latest"]
       fail-fast: false
     timeout-minutes: 15
     name: Client V2 + CH ${{ matrix.clickhouse }}