Python: Update repinning instructions

This aligns us better with the corresponding instructions for
the Ruby extractor.

Author: tausbn

python/extractor/tsg-python/Cargo.toml

@@ -7,9 +7,14 @@ authors = ["Taus Brock-Nannestad <[email protected]>"]
 edition = "2018"
 
 # When changing/updating these, the `Cargo.Bazel.lock` file has to be regenerated.
-# Check out the documentation at https://bazelbuild.github.io/rules_rust/crate_universe.html#repinning--updating-dependencies
-# for how to do so. The bazel repository for the tsg-python project is called `py_deps`,
-# and instead of calling `bazel sync`, `./build --bazel sync` should be used instead, to always use the correct bazel version.
+# Run `CARGO_BAZEL_REPIN=true CARGO_BAZEL_REPIN_ONLY=py_deps ./build --bazel sync --only=py_deps`
+# in the `semmle-code` repository to do so.
+# For more information, check out the documentation at
+# https://bazelbuild.github.io/rules_rust/crate_universe.html#repinning--updating-dependencies
+# In the future, the hope is to move this handling of the dependencies entirely into the `codeql` repository,
+# but that depends on `rules_rust` being fully compatible with bzlmod, which they aren't yet
+# (c.f. https://github.com/bazelbuild/rules_rust/issues/2452).
+# Warning: The process takes >5min on my M1 mac, so do wait for a while.
 [dependencies]
 anyhow = "1.0"
 regex = "1"