Rename variable to indent_width to match docs (#11230)

Reference:
https://github.com/astral-sh/ruff/issues/8705#issuecomment-2084726911

crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/indentation.rs

@@ -31,18 +31,21 @@ use super::LogicalLine;
 /// The rule is also incompatible with the [formatter] when using
 /// `indent-width` with a value other than `4`.
 ///
+/// ## Options
+/// - `indent-width`
+///
 /// [PEP 8]: https://peps.python.org/pep-0008/#indentation
 /// [formatter]:https://docs.astral.sh/ruff/formatter/
 #[violation]
 pub struct IndentationWithInvalidMultiple {
-    indent_size: usize,
+    indent_width: usize,
 }
 
 impl Violation for IndentationWithInvalidMultiple {
     #[derive_message_formats]
     fn message(&self) -> String {
-        let Self { indent_size } = self;
-        format!("Indentation is not a multiple of {indent_size}")
+        let Self { indent_width } = self;
+        format!("Indentation is not a multiple of {indent_width}")
     }
 }
 
@@ -71,18 +74,21 @@ impl Violation for IndentationWithInvalidMultiple {
 /// The rule is also incompatible with the [formatter] when using
 /// `indent-width` with a value other than `4`.
 ///
+/// ## Options
+/// - `indent-width`
+///
 /// [PEP 8]: https://peps.python.org/pep-0008/#indentation
 /// [formatter]:https://docs.astral.sh/ruff/formatter/
 #[violation]
 pub struct IndentationWithInvalidMultipleComment {
-    indent_size: usize,
+    indent_width: usize,
 }
 
 impl Violation for IndentationWithInvalidMultipleComment {
     #[derive_message_formats]
     fn message(&self) -> String {
-        let Self { indent_size } = self;
-        format!("Indentation is not a multiple of {indent_size} (comment)")
+        let Self { indent_width } = self;
+        format!("Indentation is not a multiple of {indent_width} (comment)")
     }
 }
 
@@ -257,9 +263,13 @@ pub(crate) fn indentation(
 
     if indent_level % indent_size != 0 {
         diagnostics.push(if logical_line.is_comment_only() {
-            DiagnosticKind::from(IndentationWithInvalidMultipleComment { indent_size })
+            DiagnosticKind::from(IndentationWithInvalidMultipleComment {
+                indent_width: indent_size,
+            })
         } else {
-            DiagnosticKind::from(IndentationWithInvalidMultiple { indent_size })
+            DiagnosticKind::from(IndentationWithInvalidMultiple {
+                indent_width: indent_size,
+            })
         });
     }
     let indent_expect = prev_logical_line