Simplify publish workflow and improve changelog generation

- Shorten workflow name to "Publish" for brevity
- Replace `secrets.GITHUB_TOKEN` with `secrets.PAT_TOKEN` for enhanced permissions
  - Allows triggering of Docker workflow
- Update changelog formatting to exclude "Signed-off-by" lines and include commit links
- Remove unnecessary changelog code block from release notes

Signed-off-by: Phillip Sitbon <phillip.sitbon@gmail.com>

Author: sitbon

.github/workflows/publish.yml

@@ -1,4 +1,4 @@
-name: Publish new release version
+name: Publish
 
 on:
   push:
@@ -40,7 +40,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Need full history for commit count
-          token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.PAT_TOKEN }}
 
       - name: Install uv
         uses: astral-sh/setup-uv@v6
@@ -98,9 +98,9 @@ jobs:
           LATEST_TAG="magg/latest"
           
           # Get changelog since last release with rich formatting
-          echo "CHANGELOG<<EOF" >> $GITHUB_ENV
-          git log ${LATEST_TAG}..${{ github.sha }} --pretty=format:'### [%s](%h)%n**Author: %an <%ae>**%n*Date: %ad*%n%n%b%n' | sed -e '/^### /!{/^$/!s/^/> /}' -e 's/^$/>/g' >> $GITHUB_ENV
-          echo "EOF" >> $GITHUB_ENV
+          echo "CHANGELOG<<EOFEOF" >> $GITHUB_ENV
+          git log ${LATEST_TAG}..${{ github.sha }} --pretty=format:'### [%s](https://github.com/${{ github.repository }}/commit/%H)%nDate: %ad*%n%n%b%n' | sed -e '/^Signed-off-by:/d' -e '/^### /!{/^$/!s/^/> /}' -e 's/^$/>/g' >> $GITHUB_ENV
+          echo "EOFEOF" >> $GITHUB_ENV
           
           # Delete remote latest tag FIRST (before creating new one)
           git push origin :refs/tags/${LATEST_TAG} || true
@@ -121,9 +121,7 @@ jobs:
             Automatically generated release triggered by commit ${{ github.sha }}
 
             ## Changes
-            ```
             ${{ env.CHANGELOG }}
-            ```
 
             ## Installation
             ```bash