ci: update Rust to 1.95.0

src/plaintext.rs

@@ -24,7 +24,6 @@ pub struct PlainText {
 impl PlainText {
     /// Convert plain text to HTML.
     /// The function handles quotes, links, fixed and floating text paragraphs.
-    #[expect(clippy::arithmetic_side_effects)]
     pub fn to_html(&self) -> String {
         static LINKIFY_MAIL_RE: LazyLock<regex::Regex> =
             LazyLock::new(|| regex::Regex::new(r"\b([\w.\-+]+@[\w.\-]+)\b").unwrap());