CI: Use Ubuntu 22.04

Issue #23

Author: davidlattimore

.github/workflows/cackle.yml

@@ -23,7 +23,7 @@ env:
 jobs:
   cackle:
     name: Cackle check and test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ env:
 jobs:
   test-stable:
     name: Test x86_64-linux stable
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
@@ -34,7 +34,7 @@ jobs:
 
   clippy:
     name: Clippy
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@stable
@@ -54,7 +54,7 @@ jobs:
 
   rustfmt:
     name: Check formatting
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@stable

.github/workflows/cron.yml

@@ -14,7 +14,7 @@ jobs:
   cackle:
     if: github.repository == 'cackle-rs/cackle'
     name: cackle with latest
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
@@ -26,7 +26,7 @@ jobs:
   test-nightly:
     if: github.repository == 'cackle-rs/cackle'
     name: Test Nightly
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@nightly

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         include:
         - build: linux
-          os: ubuntu-latest
+          os: ubuntu-22.04
           target: x86_64-unknown-linux-musl
 
     steps: