You are running Julia from an activated Conda environment which points to the CA file. Indeed you could set JULIA_SSL_CA_ROOTS_PATH to the empty string as suggested in the error message.
But if you can update to the latest LTS patch release, 1.10.10, you don’t get this error due to Don’t error when initializing LibGit2 with CA roots path by visr · Pull Request #56924 · JuliaLang/julia. You’ll still get warnings until 1.12 is released though with Search SSL_CERT_FILE before SSL_CERT_DIR by visr · Pull Request #37 · JuliaLang/NetworkOptions.jl.