chore(deps): switch dependabot package ecosystem from pip to uv (#452)

- remove update-uv-lock workflow

Signed-off-by: jmeridth <jmeridth@gmail.com>

Author: jmeridth

.github/dependabot.yml

@@ -1,7 +1,7 @@
 ---
 version: 2
 updates:
-  - package-ecosystem: "pip"
+  - package-ecosystem: "uv"
     directory: "/"
     schedule:
       interval: "weekly"