fix: dev docs CI [skip tests]

Author: mkundu1

.github/workflows/doc-build-dev-nightly.yml

@@ -61,7 +61,7 @@ jobs:
       - name: Run API codegen
         run: make api-codegen
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
 
       - name: Install again after codegen
         run: |
@@ -72,39 +72,39 @@ jobs:
         run: |
           python examples/00-fluent/exhaust_system_settings_api.py
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
 
       - name: Execute external_compressible_flow.py
         run: |
           python examples/00-fluent/external_compressible_flow.py
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
 
       - name: Execute mixing_elbow_settings_api.py
         run: |
           python examples/00-fluent/mixing_elbow_settings_api.py
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
 
       - name: Execute modeling_cavitation.py
         run: |
           python examples/00-fluent/modeling_cavitation.py
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
 
       - name: Execute species_transport.py
         run: |
           python examples/00-fluent/species_transport.py
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
 
       - name: Build All Documentation
         run: |
           pip install -r requirements/requirements_build.txt
           pip install ansys-fluent-core[docs,reader,tests]
           make build-all-docs
         env:
-          FLUENT_IMAGE_TAG: ${{ env.DOC_DEPLOYMENT_IMAGE_TAG }}
+          FLUENT_IMAGE_TAG: ${{ env.FLUENT_STABLE_IMAGE }}
           BUILD_ALL_DOCS: 1
 
       - name: Zip HTML Documentation before upload