Bump libs/EXTERNAL/libcatch2 from `b3fb4b9` to `31ee3be`#3328

AlexandreSinger merged 1 commit intomasterverilog-to-routing/vtr-verilog-to-routing:masterfrom

dependabot/submodules/libs/EXTERNAL/libcatch2-31ee3beverilog-to-routing/vtr-verilog-to-routing:dependabot/submodules/libs/EXTERNAL/libcatch2-31ee3beCopy head branch name to clipboard