ci: reduce workflow failures on forks (denoland#3176)

Publishing packages workflow and deploying to Deno Deploy step runs even
for forks. This is annoying, since it creates some spam every push for
any open PR's.

This PR tries to address this, by skipping certain steps or workflows
unless the current GitHub org is `denoland`, which should be pretty safe
long term.

## Failed workflow spam

<img width="1396" height="635" alt="image"
src="https://github.com/user-attachments/assets/d939d1f5-e736-42a4-9355-f946b3d6ddf2"
/>

<img width="1577" height="905" alt="image"
src="https://github.com/user-attachments/assets/fbf7ffe3-2759-430a-a33e-c8de0d7e113c"
/>

Author: csvn

.github/workflows/deploy.yml

@@ -29,6 +29,8 @@ jobs:
 
       - name: Upload to Deno Deploy
         uses: denoland/deployctl@v1
+        # Skip publishing for forks
+        if: github.repository_owner == 'denoland'
         with:
           project: "fresh"
           entrypoint: "./www/_fresh/server.js"

.github/workflows/publish.yml

@@ -12,6 +12,9 @@ jobs:
       contents: read
       id-token: write
 
+    # Skip publishing for forks
+    if: github.repository_owner == 'denoland'
+
     steps:
       - uses: actions/checkout@v4