Update release tagging using publish action.

.github/workflows/main.yml

@@ -1053,20 +1053,33 @@ jobs:
 
     - name: Tag with CMake version if not already.
       run: |
+        git config --local user.name "Development bot"
+        git config --local user.email "[email protected]"
+
         # We want to tag whenever the cmake version changes. So extract the
         # hash of when the current version was entered.
         read TAG_HASH TAG_VERSION <<<$(git annotate -l CMakeLists.txt | sed 's/\(^[0-9A-Fa-f]\+\).*project(SURELOG VERSION \([0-9]\+\.[0-9]\+\).*/\1 \2/p;d')
 
-        echo "Surelog Version v${TAG_VERSION} at hash ${TAG_HASH}"
+        TAG="v${TAG_VERSION}"
+        echo "Surelog Version ${TAG} at hash ${TAG_HASH}"
 
         # If this is the first time we see this tag: apply.
-        if [ -z "$(git tag -l "v${TAG_VERSION}")" ]; then
-          git tag -a "v${TAG_VERSION}" ${TAG_HASH} -m "Update to v${TAG_VERSION}"
-          git push origin "v${TAG_VERSION}"
+        if [ -z "$(git tag -l "${TAG}")" ]; then
+          git tag -a "${TAG}" ${TAG_HASH} -m "Update to ${TAG}"
+          echo "TAG=$TAG" >> $GITHUB_ENV
         else
           echo "Tag already applied"
         fi
 
+    - name: Publish tag
+      if: ${{ env.TAG != '' }}
+      # For now, just publish tag, but we can also use this to
+      # publish the binaries we built before.
+      uses: svenstaro/upload-release-action@v2
+      with:
+        repo_token: ${{ secrets.GITHUB_TOKEN }}
+        tag: ${{ env.TAG }}
+
 # Code formatting
   CodeFormatting:
     runs-on: ubuntu-20.04