ci: Bump ubunutu

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ env:
 
 jobs:
   lint:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v3
@@ -56,7 +56,7 @@ jobs:
           - aarch64-unknown-linux-gnu
           - armv7-unknown-linux-gnueabi
           - riscv64gc-unknown-linux-gnu
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
 
@@ -107,7 +107,7 @@ jobs:
         target:
           - bpfel-unknown-none
           - bpfeb-unknown-none
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v3