write the rule separately

Author: tshepang

src/changelog.rst

@@ -45,6 +45,8 @@ Language changes in Rust 1.90.0
 
     - :p:`fls_dQdSxf8kOgbi`
 
+    - :p:`fls_qC6L0km0ZMFI`
+
 - `Allow volatile access to non-Rust memory, including address 0 <https://github.com/rust-lang/rust/pull/141260>`_
 
   - No change: lints are not part of the FLS

src/values.rst

@@ -119,8 +119,11 @@ After :t:`type coercion`, the value of the constant cannot contain any
   The :t:`mutable reference` is contained within an :t:`external static`, or
 
 - :dp:`fls_VhzGfnWg7YrG`
-  The :t:`mutable reference` is contained within a :t:`mutable static`
-  or a :t:`static` whose type is subject to :t:`interior mutability`, or
+  The :t:`mutable reference` is contained within a :t:`mutable static`, or
+
+- :dp:`fls_qC6L0km0ZMFI`
+  The :t:`mutable reference` is contained within a :t:`static`
+  whose type is subject to :t:`interior mutability`, or
 
 - :dp:`fls_ibYKKQdB2tDn`
   The :t:`mutable reference` is contained within an :t:`union`, or