Fix the problem with the failed compilation of openssl-sys in slim co…

…ntainer

The most important change here is the new step Install OpenSSL, which has been added before the tests and the build. This step installs the necessary development libraries for OpenSSL

.github/workflows/rust.yml

@@ -14,11 +14,16 @@ jobs:
     runs-on: ubuntu-latest
 
     container: 
-      image: rust:1.70-slim-bullseye
+      image: rust:slim-bullseye
 
     steps:
     - uses: actions/checkout@v3
 
+    - name: Install OpenSSL
+      run: |
+        apt-get update
+        apt-get install -y pkg-config libssl-dev
+    
     - name: Run tests
       run: cargo test --verbose