[ci] Build Linux release binaries on Ubuntu 22.04

Mainline support for Ubuntu 20.04 ended in September and it is deprecated on
GitHub actions starting February 2025. Accordingly, we should build on 22.04
instead, meaning that the two latest LTS releases will continue to be supported.
Since 22.04 uses glibc 2.35, the new release will no longer work on systems
using a lower glibc version, including Debian Bullseye (mainline support ended
in August). Update README.md to reflect this.

.github/workflows/_bazel.yml

@@ -5,7 +5,7 @@ on:
       image:
         type: string
         required: false
-        default: "ubuntu-20.04"
+        default: "ubuntu-22.04"
       os_name:
         type: string
         required: false

.github/workflows/npm-types.yml

@@ -30,7 +30,7 @@ jobs:
           echo "version=${{ inputs.prerelease == false && '4' || '0'}}.$(cat src/workerd/io/supported-compatibility-date.txt | tr -d '-').${{ inputs.patch }}" >> $GITHUB_OUTPUT;
           echo "release_version=1.$(cat src/workerd/io/supported-compatibility-date.txt | tr -d '-').0" >> $GITHUB_OUTPUT;
   build-and-publish-types:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs: version
     steps:
       - uses: actions/checkout@v4

.github/workflows/npm.yml

@@ -75,7 +75,7 @@ jobs:
     # if: github.repository_owner == 'cloudflare'
     name: Publish `workerd` to NPM
     needs: [version, publish-arch-specific]
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v4

.github/workflows/release-python-runtime.yml

@@ -12,7 +12,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     name: build Python runtime
     steps:
       - uses: actions/checkout@v4

.github/workflows/release.yml

@@ -10,7 +10,7 @@ jobs:
     outputs:
       version: ${{ steps.echo.outputs.version }}
     # version job uses ubuntu 24.04, this way we don't have to install the updated clang while
-    # the build job uses 20.04 for libc compatibility.
+    # the build job uses 22.04 for libc compatibility.
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
@@ -56,11 +56,11 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-15, windows-2022]
+        os: [ubuntu-22.04, macos-15, windows-2022]
         target-arch: [ X64 ]
         include:
           - os-name: linux
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             bazel-config: release_linux
           # Based on runner availability, we build both Apple Silicon and (cross-compiled) x86
           # release binaries on the macos-15 runner.

.github/workflows/test.yml

@@ -27,7 +27,7 @@ jobs:
       matrix:
         os:
           [
-            { name : linux, image : ubuntu-20.04 },
+            { name : linux, image : ubuntu-22.04 },
             { name : macOS, image : macos-15 },
             { name : windows, image : windows-2022 }
           ]
@@ -40,7 +40,7 @@ jobs:
           ]
         include:
           # Add an Address Sanitizer (ASAN) build on Linux for additional checking.
-          - os:     { name: linux, image: ubuntu-20.04 }
+          - os:     { name: linux, image: ubuntu-22.04 }
             config: { suffix: -asan }
           # Windows has a custom non-debug bazel config.
           - os:     { name : windows, image : windows-2022 }

.github/workflows/type-snapshot.yml

@@ -16,7 +16,7 @@ concurrency:
 
 jobs:
   check-snapshot:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with:

README.md

@@ -178,7 +178,7 @@ For more details about command-line usage, use `workerd --help`.
 Prebuilt binaries are distributed via `npm`. Run `npx workerd ...` to use these. If you're running a prebuilt binary, you'll need to make sure your system has the right dependencies installed:
 
 * On Linux:
-  * glibc 2.31 or higher (already included on e.g. Ubuntu 20.04, Debian Bullseye)
+  * glibc 2.35 or higher (already included on e.g. Ubuntu 22.04, Debian Bookworm)
 * On macOS:
   * macOS 13.5 or higher
   * The Xcode command line tools, which can be installed with `xcode-select --install`