fix: Fix typo in .air.toml (#36)

Author: sonjek

.air.toml

@@ -6,7 +6,7 @@ tmp_dir = "tmp"
   cmd = "make build"
   delay = 1000
   exclude_file = ["README.md"]
-  exclude_regex = ["_templ.go", "_test.go", "*.db"]
+  exclude_regex = ["_templ.go", "_test.go", ".db"]
   exclude_unchanged = false
   follow_symlink = false
   full_bin = ""