doc: upgrade docs requirements

Signed-off-by: Frost Ming <me@frostming.com>

docs/requirements.in

@@ -0,0 +1,2 @@
+sphinx
+furo

docs/requirements.txt

@@ -1,2 +1,57 @@
-sphinx==4.3.2
-furo==2021.11.23
+# This file was autogenerated by uv via the following command:
+#    uv pip compile docs/requirements.in -o docs/requirements.txt
+alabaster==0.7.16
+    # via sphinx
+babel==2.15.0
+    # via sphinx
+beautifulsoup4==4.12.3
+    # via furo
+certifi==2024.7.4
+    # via requests
+charset-normalizer==3.3.2
+    # via requests
+docutils==0.21.2
+    # via sphinx
+furo==2024.7.18
+    # via -r docs/requirements.in
+idna==3.7
+    # via requests
+imagesize==1.4.1
+    # via sphinx
+jinja2==3.1.4
+    # via sphinx
+markupsafe==2.1.5
+    # via jinja2
+packaging==24.1
+    # via sphinx
+pygments==2.18.0
+    # via
+    #   furo
+    #   sphinx
+requests==2.32.3
+    # via sphinx
+snowballstemmer==2.2.0
+    # via sphinx
+soupsieve==2.5
+    # via beautifulsoup4
+sphinx==7.4.7
+    # via
+    #   -r docs/requirements.in
+    #   furo
+    #   sphinx-basic-ng
+sphinx-basic-ng==1.0.0b2
+    # via furo
+sphinxcontrib-applehelp==1.0.8
+    # via sphinx
+sphinxcontrib-devhelp==1.0.6
+    # via sphinx
+sphinxcontrib-htmlhelp==2.0.6
+    # via sphinx
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==1.0.8
+    # via sphinx
+sphinxcontrib-serializinghtml==1.1.10
+    # via sphinx
+urllib3==2.2.2
+    # via requests