[CI] Fix Antlr4.10 issue #98
Description
Antlr 4.10 broke the toolchain, as it has a hard requirement of C++20. Therefore, force version to 4.9.3 for now.
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Antlr 4.10 broke the toolchain, as it has a hard requirement of C++20. Therefore, force version to 4.9.3 for now.