Update reusable workflows and container URLs after NNPDF/workflows migration

Author: alecandido

.github/workflows/bench.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     container:
-      image: ghcr.io/n3pdf/lhapdf:v2
+      image: ghcr.io/nnpdf/lhapdf:v2
       credentials:
         username: ${{ github.repository_owner }}
         password: ${{ github.token }}

.github/workflows/pypi.yml

@@ -7,6 +7,6 @@ on:
 
 jobs:
   publish:
-    uses: N3PDF/workflows/.github/workflows/python-poetry-pypi.yml@v2
+    uses: NNPDF/workflows/.github/workflows/python-poetry-pypi.yml@v2
     secrets:
       PYPI_TOKEN: ${{ secrets.PYPI_TOKEN }}

.github/workflows/unittests.yml

@@ -8,6 +8,6 @@ jobs:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10"]
 
-    uses: N3PDF/workflows/.github/workflows/python-poetry-tests.yml@v2
+    uses: NNPDF/workflows/.github/workflows/python-poetry-tests.yml@v2
     with:
       python-version: ${{ matrix.python-version }}