github/workflows: Use same Ubuntu for code_size as ports_esp32.

Also make sure code_size runs when the esp32 port source changes, as per
the other ports that are built as part of code_size.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>
Signed-off-by: Damien George <damien@micropython.org>

Author: jepler

.github/workflows/code_size.yml

@@ -10,6 +10,7 @@ on:
       - 'shared/**'
       - 'lib/**'
       - 'ports/bare-arm/**'
+      - 'ports/esp32/**'
       - 'ports/mimxrt/**'
       - 'ports/minimal/**'
       - 'ports/rp2/**'
@@ -23,7 +24,7 @@ concurrency:
 
 jobs:
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
       with: