CI: Run MSRV job with both lock files

Currently we are not running the MSRV job with both lock files, we
should. Note also that the lock files are different, testing older
versions of `hashes` and `internals` - this is because of the range
dependency in `secp` (I think).

.github/workflows/rust.yml

@@ -53,13 +53,13 @@ jobs:
       - name: "Run test script"
         run: ./maintainer-tools/ci/run_task.sh nightly
 
-  MSRV:                         # 1 jobs, minimal lock file only.
+  MSRV:                         # 2 jobs, one per lock file.
     name: Test - 1.63.0 toolchain
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        dep: [minimal]
+        dep: [minimal, recent]
     steps:
       - name: "Checkout repo"
         uses: actions/checkout@v4