Bump workflows to Ubuntu 26.04 (#3157)

Author: IsaacG

.github/workflows/check-formatting.yml

@@ -16,14 +16,14 @@ jobs:
       fail-fast: false
       matrix:
         go-version: [1.26.x]
-        os: [ubuntu-24.04, windows-2025, macOS-latest]
+        os: [ubuntu-26.04, windows-2025, macOS-latest]
         test-arch: [amd64]
         race: ["-race"]
 
         include:
           - go-version: 1.26.x
             test-arch: "386"
-            os: ubuntu-24.04
+            os: ubuntu-26.04
             race: ""
           - go-version: 1.26.x
             test-arch: "386"

.github/workflows/exercise-tests.yml

@@ -16,14 +16,14 @@ jobs:
       fail-fast: false
       matrix:
         go-version: [1.26.x]
-        os: [ubuntu-24.04, windows-2025, macOS-latest]
+        os: [ubuntu-26.04, windows-2025, macOS-latest]
         test-arch: [amd64]
         race: ["-race"]
 
         include:
           - go-version: 1.26.x
             test-arch: "386"
-            os: ubuntu-24.04
+            os: ubuntu-26.04
             race: ""
           - go-version: 1.26.x
             test-arch: "386"

.github/workflows/gotools.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   check:
     name: gotools check
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd

.github/workflows/stub-tests.yml

@@ -16,14 +16,14 @@ jobs:
       fail-fast: false
       matrix:
         go-version: [1.26.x]
-        os: [ubuntu-24.04, windows-2025, macOS-latest]
+        os: [ubuntu-26.04, windows-2025, macOS-latest]
         test-arch: [amd64]
         race: ["-race"]
 
         include:
           - go-version: 1.26.x
             test-arch: "386"
-            os: ubuntu-24.04
+            os: ubuntu-26.04
             race: ""
           - go-version: 1.26.x
             test-arch: "386"