Pin proptest again to fix CI

.. `proptest` 1.9.0 was just released, now requiring rustc 1.82.

Author: tnull

ci/ci-tests.sh

@@ -17,6 +17,9 @@ PIN_RELEASE_DEPS # pin the release dependencies in our main workspace
 # The backtrace v0.3.75 crate relies on rustc 1.82
 [ "$RUSTC_MINOR_VERSION" -lt 82 ] && cargo update -p backtrace --precise "0.3.74" --verbose
 
+# proptest 1.9.0 requires rustc 1.82.0
+[ "$RUSTC_MINOR_VERSION" -lt 82 ] && cargo update -p proptest --precise "1.8.0" --verbose
+
 export RUST_BACKTRACE=1
 
 echo -e "\n\nChecking the workspace, except lightning-transaction-sync."