py(deps): gp-sphinx 0.0.1a6 -> 0.0.1a7

why: Pick up the sphinx-argparse-neo multi-page duplicate-label
scoping fix landed in gp-sphinx PR #16 so docs builds on this
branch emit fewer duplicate label warnings.
what:
- Bump gp-sphinx and sibling package pins from 0.0.1a6 to 0.0.1a7
- Regenerate uv.lock

Author: tony

pyproject.toml

@@ -52,9 +52,9 @@ Changes = "https://github.com/tmux-python/libtmux/blob/master/CHANGES"
 [dependency-groups]
 dev = [
   # Docs (via gp-sphinx)
-  "gp-sphinx==0.0.1a6",
-  "sphinx-autodoc-api-style==0.0.1a6",
-  "sphinx-autodoc-pytest-fixtures==0.0.1a6",
+  "gp-sphinx==0.0.1a7",
+  "sphinx-autodoc-api-style==0.0.1a7",
+  "sphinx-autodoc-pytest-fixtures==0.0.1a7",
   "sphinx-autobuild",
   "types-docutils",
   # Testing
@@ -75,9 +75,9 @@ dev = [
 ]
 
 docs = [
-  "gp-sphinx==0.0.1a6",
-  "sphinx-autodoc-api-style==0.0.1a6",
-  "sphinx-autodoc-pytest-fixtures==0.0.1a6",
+  "gp-sphinx==0.0.1a7",
+  "sphinx-autodoc-api-style==0.0.1a7",
+  "sphinx-autodoc-pytest-fixtures==0.0.1a7",
   "sphinx-autobuild",
 ]
 testing = [