chore: Apply source code spelling corrections from typos

Cargo.toml

@@ -81,7 +81,8 @@ lto = true
 [package.metadata.typos.default]
 locale = "en-us"
 extend-ignore-identifiers-re = [
-  "Heros"
+  "Heros",
+  "[Cc]alibre",
 ]
 
 [package.metadata.typos.default.extend-words]

README.md

@@ -496,7 +496,7 @@ To override the defaults set them in your project’s `casile.mk`
 #### Build time settings
 
 These settings are usually not changed except at run time.
-You _may_ set them in your rules file such as `casile.mk` but they would typically be set as environment variables or on the command line to get other-than-default behaviour for a specific build.
+You _may_ set them in your rules file such as `casile.mk` but they would typically be set as environment variables or on the command line to get other-than-default behavior for a specific build.
 
 * `DRAFT` enables draft mode builds for faster testing.
 

src/i18n.rs

@@ -212,7 +212,7 @@ pub fn normalize_lang(input: &str) -> String {
     re.replace(input, "").to_string()
 }
 
-/// Scan our embedded assets for what recognisable locale data we have on hand
+/// Scan our embedded assets for what recognizable locale data we have on hand
 // https://github.com/projectfluent/fluent-rs/blob/c9e45651/fluent-resmgr/examples/simple-resmgr.rs#L35
 pub fn list_available_locales() -> Locales {
     let mut embedded = vec![];