Update GitHub Actions workflow for PDF generation

Author: MohamedLaghdafHABIBOULLAH

.github/workflows/draft-pdf.yml

@@ -1,4 +1,12 @@
-on: [push]
+name: Build joss paper draft PDF
+on:
+  push:
+    branches:
+      - master
+      - main
+      - paper
+  pull_request:
+    types: [opened, synchronize, reopened]
 
 jobs:
   paper:

paper/paper.md

@@ -2,10 +2,10 @@
 title: 'RegularizedOptimization.jl: A Julia framework for regularization-based nonlinear optimization'
 tags:
   - Julia
-  - nonlinear optimization
+  - nonsmooth optimization
+  - nonconvex optimization
   - regularization methods
   - trust-region methods
-  - nonsmooth optimization
 authors:
   - name: Youssef Diouane
     orcid: 0000-0002-6609-7330