Update uv (#1538)

The Pytorch index has been flaky recently, causing [builds to
fail](https://github.com/PennyLaneAI/qml/actions/runs/17419394443). This
PR bumps the version of `uv`, which includes automatic retries in the
event of a 503 response from the Pytorch index.

This has been
[tested](https://github.com/PennyLaneAI/qml/actions/runs/17444053054),
but since we can't make the Pytorch index unavailable we won't know it
works until we stop seeing failures due to 503s from Pytorch.

Author: doctorperceptron

dependencies/requirements-build.txt

@@ -6,6 +6,6 @@ markupsafe==2.1.1
 pyyaml~=6.0.1
 pypandoc==1.5
 pennylane-sphinx-theme @ git+https://github.com/PennyLaneAI/pennylane-sphinx-theme.git@sphinx-update
-uv~=0.5
+uv~=0.7.18
 numpy~=1.24
 pennylane

poetry.lock

@@ -21,7 +21,7 @@ dependencies = [
   "dulwich<0.22",
   "requirements-parser>=0.11.0,<0.12.0",
   "lxml>=5.3.0,<6.0.0",
-  "uv>=0.5.25,<0.6.0",
+  "uv>=0.7.18,<0.8.0",
   "sphobjinv>=2.3.1.3,<3.0.0"
 ]
 
@@ -69,7 +69,7 @@ pyyaml = "^6.0.1"
 pennylane-sphinx-theme = { git = "https://github.com/PennyLaneAI/pennylane-sphinx-theme.git", branch = "sphinx-update" }
 pypandoc = "1.5"
 pennylane = "0.42.0"
-uv = "^0.5.25"
+uv = "^0.7.18"
 
 # Metadata validation dependencies (optional)
 [tool.poetry.group.metadata-validation]