Update to using Libressl 4.2.1 (#45)

Author: SeanTAllen

.github/workflows/breakage-against-linux-ponyc-latest.yml

@@ -34,7 +34,7 @@ jobs:
     name: LibreSSL 4.x with ponyc main
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/ponylang/shared-docker-ci-standard-builder-with-libressl-4.2.0:nightly
+      image: ghcr.io/ponylang/shared-docker-ci-standard-builder-with-libressl-4.2.1:nightly
     steps:
       - uses: actions/checkout@v6.0.2
       - name: Test

.github/workflows/pr.yml

@@ -31,7 +31,7 @@ jobs:
     name: LibreSSL 4.x with most recent ponyc release
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/ponylang/shared-docker-ci-standard-builder-with-libressl-4.2.0:release
+      image: ghcr.io/ponylang/shared-docker-ci-standard-builder-with-libressl-4.2.1:release
     steps:
       - uses: actions/checkout@v6.0.2
       - name: Test