ci: simplify python dependency step for release/doc pipeline (#596)

Slightly simplifies the whole Python dependency step for pipelines generating mkdocs.

.github/workflows/docs.yml

@@ -5,13 +5,13 @@ on:
     branches:
       - master
     paths:
-      - 'docs/**'
-      - '.github/workflows/docs.yml'
+      - "docs/**"
+      - ".github/workflows/docs.yml"
 
 env:
   # Assign commit authorship to official Github Actions bot when pushing to the `gh-pages` branch:
-  GIT_USER: 'github-actions[bot]'
-  GIT_EMAIL: '41898282+github-actions[bot]@users.noreply.github.com'
+  GIT_USER: "github-actions[bot]"
+  GIT_EMAIL: "41898282+github-actions[bot]@users.noreply.github.com"
 
 jobs:
   build-documentation:
@@ -26,11 +26,8 @@ jobs:
         with:
           python-version: 3.x
 
-      - run: pip install mkdocs-material==7.2.6
-
-      - run: pip install mdx_truly_sane_lists==1.2
-
-      - run: pip install mike==1.1.0
+      - name: Install Python dependencies
+        run: pip install docs/requirements.txt
 
       - name: Configure git user and email
         run: |

.github/workflows/post-release.yml

@@ -27,15 +27,9 @@ jobs:
         run: |
           echo $RELEASE_VERSION
 
-      - name: Make sure you're not on master...
+      - name: Make sure you're not on master/main/nightly...
         run: |
-          if [[ $RELEASE_VERSION == "master" ]]; then
-            exit 1
-          fi
-
-      - name: Make sure you're not on nightly...
-        run: |
-          if [[ $RELEASE_VERSION == "nightly" ]]; then
+          if [[ $RELEASE_VERSION == "master" || $RELEASE_VERSION == "main" || $RELEASE_VERSION == "nightly" ]]; then
             exit 1
           fi
 
@@ -43,11 +37,8 @@ jobs:
         with:
           python-version: 3.x
 
-      - run: pip install mkdocs-material==7.2.6
-
-      - run: pip install mdx_truly_sane_lists==1.2
-
-      - run: pip install mike==1.1.0
+      - name: Install Python dependencies
+        run: pip install docs/requirements.txt
 
       - name: Configure git user and email
         run: |

docs/requirements.txt

@@ -0,0 +1,3 @@
+mkdocs-material == 7.3.2
+mdx_truly_sane_lists == 1.2
+mike == 1.1.2