correct version declaration

Author: askpatrickw

.github/workflows/build.yml

@@ -42,9 +42,9 @@ jobs:
       # (e.g. - apt-get: gettext, etc; pip: circuitpython-build-tools, requirements.txt; etc.)
       run: |
         source actions-ci/install.sh
-    - name: Pip install Sphinx@4.3.2, pre-commit
+    - name: Pip install Sphinx 4.3.2, pre-commit
       run: |
-        pip install --force-reinstall Sphinx@4.3.2 sphinx-rtd-theme pre-commit
+        pip install --force-reinstall Sphinx==4.3.2 sphinx-rtd-theme pre-commit
     - name: Library version
       run: git describe --dirty --always --tags
     - name: Pre-commit hooks

docs/requirements.txt

@@ -2,4 +2,4 @@
 #
 # SPDX-License-Identifier: Unlicense
 
-sphinx>=4.3.2
+sphinx==4.3.2