Increasing the size of the runner used for releases.

Note, this runner is provided as part of the CNCF access to GitHub
Enterprise runners.

Signed-off-by: Matt Farina <matt.farina@suse.com>
(cherry picked from commit 029e983241)

.github/workflows/release.yml

@@ -15,7 +15,7 @@ on:
 jobs:
   release:
     if: startsWith(github.ref, 'refs/tags/v')
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-16-cores
     steps:
       - name: Checkout source code
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # pin@v4.1.7
@@ -72,7 +72,7 @@ jobs:
           connection_string: ${{ secrets.AZURE_STORAGE_CONNECTION_STRING }}
 
   canary-release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-16-cores
     if: github.ref == 'refs/heads/main'
     steps:
       - name: Checkout source code