Use a hack in MSRV test

Author: kngwyu

.github/workflows/ci.yml

@@ -98,9 +98,8 @@ jobs:
             toml.dump(cargo_toml, f)
         working-directory: ../simple-extension-msrv
         shell: python
-      - name: Use ndarray 0.13.1 and num-complex 0.2.0
-        run: |
-          cargo update -p ndarray:0.15.3 --precise 0.13.1
+      - name: Use ndarray 0.13.1
+        run: cargo update -p (cargo pkgid -p ndarray 2>&1 >/dev/null | grep 0.15 | sed -e 's/^[ \t]*//') --precise 0.13.1
         working-directory: ../simple-extension-msrv
       - name: Test Example
         run: |