fix: change minimal-versions check to use direct-minimal-versions

Author: abonander

.github/workflows/sqlx.yml

@@ -64,7 +64,7 @@ jobs:
         run: |
           rustup show active-toolchain || rustup toolchain install
           rustup toolchain install nightly
-      - run: cargo +nightly generate-lockfile -Z minimal-versions
+      - run: cargo +nightly generate-lockfile -Z direct-minimal-versions
       - run: cargo build --all-features
 
   test: