Rust/Ruby/Python/Ql: update rust-toolchain.toml

Author: Paolo Tranquilli

python/extractor/tsg-python/rust-toolchain.toml

@@ -0,0 +1,8 @@
+# This file specifies the Rust version used to develop and test the
+# extractors written in rust. It is set to the lowest version of Rust
+# we want to support.
+
+[toolchain]
+channel = "1.85"
+profile = "minimal"
+components = [ "clippy", "rustfmt" ]