Reduce verbosity of dev commands (#24917)

### Before

```
$ make watch
bash build/watch.sh
make[1]: Entering directory '/Users/silverwind/git/gitea'
make[1]: Entering directory '/Users/silverwind/git/gitea'
GITEA_RUN_MODE=dev go run github.com/cosmtrek/air@v1.43.0 -c .air.toml
rm -rf public/js public/css public/fonts public/img/webpack public/serviceworker.js
NODE_ENV=development npx webpack --watch --progress
```

### After

```
$ make watch
GITEA_RUN_MODE=dev go run github.com/cosmtrek/air@v1.43.0 -c .air.toml
NODE_ENV=development npx webpack --watch --progress
```

1 files changed, 1 insertions, 1 deletions

diff --git a/.air.toml b/.air.toml
index 6825118b95..d13f8c4f99 100644
--- a/.air.toml
+++ b/.air.toml
@@ -2,7 +2,7 @@ root = "."
 tmp_dir = ".air"
 
 [build]
-cmd = "make backend"
+cmd = "make --no-print-directory backend"
 bin = "gitea"
 delay = 1000
 include_ext = ["go", "tmpl"]