Fix github runner for v0.10

At the time of writing, the github runner for ubuntu-latest is
22.04, but this will change to 24.04 later in the year.

This PR fixes the CI runner version at 22.04 for v0.10.x

.github/workflows/build.yml

@@ -20,43 +20,43 @@ jobs:
           - CC: gcc
             feature_set: min
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: false
             DISTCHECK: false
 
           - CC: g++
             feature_set: min
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: false
             DISTCHECK: false
 
           - CC: clang
             feature_set: min
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: false
             DISTCHECK: false
 
           # Maximal 64-bit arch builds
           - CC: gcc
             feature_set: max
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: true
             DISTCHECK: true
 
           - CC: g++
             feature_set: max
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: false
             DISTCHECK: false
 
           - CC: clang
             feature_set: max
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: true
             DISTCHECK: true
 
@@ -66,7 +66,7 @@ jobs:
           - CC: gcc
             feature_set: max
             arch: amd64
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: true
             DISTCHECK: false
             name_extra: and DEBUG
@@ -76,23 +76,23 @@ jobs:
           - CC: gcc
             feature_set: max
             arch: i386
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: true
             DISTCHECK: false
             name_extra: for 32-bit arch (legacy OS)
 
           - CC: g++
             feature_set: max
             arch: i386
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: false
             DISTCHECK: false
             name_extra: for 32-bit arch (legacy OS)
 
           - CC: clang
             feature_set: max
             arch: i386
-            os: ubuntu-latest
+            os: ubuntu-22.04
             unittests: true
             DISTCHECK: false
             name_extra: for 32-bit arch (legacy OS)
@@ -160,7 +160,7 @@ jobs:
 
   cppcheck:
     name: cppcheck
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       CC: gcc
       # This is required to use a version of cppcheck other than that
@@ -189,7 +189,7 @@ jobs:
 
   code_formatting_check:
     name: code formatting check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       CC: gcc
       # This is required to use a version of astyle other than that