chore: update igniter in CI

Author: zachdaniel

.github/workflows/test-projects.yml

@@ -53,10 +53,12 @@ jobs:
         working-directory: ./${{matrix.project.name}}
       - run: mix archive.install hex igniter_new --force
       - run: mix archive.install hex phx_new --force
-      - run: mix igniter.new my_phoenix_app --with ${{matrix.project.with}}
+      - run: mix igniter.new my_app --with ${{matrix.project.with}}
+      - run: mix deps.update igniter
+      - working-directory: my_app
       - run: mix igniter.add igniter@path:../igniter --yes
-        working-directory: my_phoenix_app
+        working-directory: my_app
       - run: mix igniter.install ${{matrix.project.install}} ${{matrix.project.flags}}
-        working-directory: my_phoenix_app
+        working-directory: my_app
       - run: mix compile --warnings-as-errors
-        working-directory: my_phoenix_app
+        working-directory: my_app