update README and package version

Author: Yo'av Moshe

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "wttrbar"
-version = "0.11.1"
+version = "0.11.2"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

Cargo.toml

@@ -29,6 +29,7 @@ For NixOS, use the [NixPkg](https://search.nixos.org/packages?channel=24.05&show
 - `--mph` - use mph instead of km/h for wind speed
 - `--custom-indicator STRING` - optional expression that will be shown instead of main indicator. [`current_conditions` and `nearest_area` keys](https://wttr.in/?format=j1) surrounded by {} can be used. For example, `"{ICON} {FeelsLikeC} ({areaName})"` will be transformed to `"text":"🌧️ -4 (Amsterdam)"` in the output
 - `--lang LANG` - set language (currently `en`, `de`, `pl`, `tr`, `fr`, `ru`, `zh`, `be`, `es`, `pt`, `it`, `ja`, `uk`, `sv`; submit a PR to add yours)
+- `--observation-time` - show the time the current weather conditions were measured
 
 e.g. `wttrbar --date-format "%m/%d" --location Paris --hide-conditions`