ci: update to new Docker image

Contains two updates:

  - Ubuntu 22.04 (instead of 21.10 which is EOL).
  - Adding the `libssl-dev` package.

Signed-off-by: Miguel Ojeda <[email protected]>

Author: ojeda

.github/workflows/ci.yaml

@@ -7,7 +7,7 @@ on:
 jobs:
   ci:
     runs-on: ubuntu-20.04
-    container: ghcr.io/rust-for-linux/ci:Rust-1.62.0
+    container: ghcr.io/rust-for-linux/ci:Rust-1.62.0-2
     timeout-minutes: 25
 
     strategy: