Replace pipx with uv for installing Python-based tools

.local/bin/upgrade

@@ -19,8 +19,8 @@ cargo_update() {
     cargo install $(cargo install --list | grep '^[a-z0-9_-]\+ v[0-9.]\+:$' | cut --delimiter=' ' --fields=1)
 }
 
-pipx_update() {
-    pipx upgrade-all
+uv_update() {
+    uv tool upgrade --all
 }
 
 git_sync_update() {
@@ -38,7 +38,7 @@ podman_update() {
 
 apt_update
 emacs_update
-pipx_update
+uv_update
 cargo_update
 ghup
 git_sync_update