ci: pin proptest to 1.11.0 for MSRV

`proptest` 1.12.0 requires rustc 1.88, which breaks the 1.85.0 MSRV
job. 1.11.0 is the latest release that supports 1.85.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

diff --git a/ci/pin-msrv.sh b/ci/pin-msrv.sh
index 703558e4199d4a1632111754fd2d437c809aa889..1529c38052214ad8a4d795ad4801efa509565b2e 100755 (executable)
--- a/ci/pin-msrv.sh
+++ b/ci/pin-msrv.sh
@@ -15,3 +15,4 @@ cargo update -p icu_normalizer --precise "2.1.1"
 cargo update -p icu_provider --precise "2.1.1"
 cargo update -p icu_locale_core --precise "2.1.1"
 cargo update -p yoke-derive --precise "0.8.2"
+cargo update -p proptest --precise "1.11.0"