Fix broken circleci job for macOS

This PR updates the openssl version to be installed for testing macOS builds

The circleci config file currently points to [email protected] to install openssl for macOS. This change was made as
part of the following [PR](080c3dd),
where previously `openssl@3` pointed to `openssl v3.0.x` which was causing errors trying to build oqs-provider.
So the change was made to specify `[email protected]`. OpenSSL v3.2 was released last week and the circleci jobs for
macOS started failing since `[email protected]` is no longer available to install using homebrew. Instead the following
are the options: `openssl@3` (which points to the current stable version, v3.2), `[email protected]` and `[email protected]`.

Changes made in this PR include:
- pointing the openssl version back to `openssl@3` since it now points to the latest 3.2
- a small doc change to the CONTRIBUTING doc to update the circleci command to run a specific job locally. (This
  command no longer accepts the --job option)

.circleci/config.yml

@@ -166,7 +166,7 @@ jobs:
       - when:
           condition:
             not:
-              equal: [ openssl@3.1, << parameters.OPENSSL_PREINSTALL >> ]
+              equal: [ openssl@3, << parameters.OPENSSL_PREINSTALL >> ]
           steps:
             - run:
                 name: Clone and build OpenSSL(3) master
@@ -186,7 +186,7 @@ jobs:
                   fi
       - when:
           condition:
-              equal: [ openssl@3.1, << parameters.OPENSSL_PREINSTALL >> ]
+              equal: [ openssl@3, << parameters.OPENSSL_PREINSTALL >> ]
           steps:
             - run:
                 name: Build OQS-OpenSSL provider
@@ -301,12 +301,12 @@ workflows:
       - macOS:
           name: macOS-shared
           CMAKE_ARGS: -DBUILD_SHARED_LIBS=ON -DOQS_DIST_BUILD=OFF -DOQS_ENABLE_KEM_CLASSIC_MCELIECE=OFF
-          OPENSSL_PREINSTALL: openssl@3.1
+          OPENSSL_PREINSTALL: openssl@3
       - macOS:
           name: macOS-static
           OQS_PROVIDER_BUILD_STATIC: true
           CMAKE_ARGS: -DOQS_DIST_BUILD=OFF -DOQS_ENABLE_KEM_CLASSIC_MCELIECE=OFF
-          OPENSSL_PREINSTALL: openssl@3.1
+          OPENSSL_PREINSTALL: openssl@3
   on-main-branch:
     when:
       or:

CONTRIBUTING.md

@@ -37,7 +37,7 @@ run the following command in the project main directory prior to finishing a PR:
 If encountering CI errors in CircleCI, it may be helpful to execute the test jobs
 locally to debug. This can be facilitated by executing the command
 
-   circleci local execute --job some-test-job
+   circleci local execute some-test-job
 
 assuming "some-test-job" is the name of the test to be executed and the CircleCI
 [command line tools have been installed](https://circleci.com/docs/local-cli).