fix(guideline): remap stale shift FLS references

Author: PLeVasseur

src/coding-guidelines/expressions/gui_LvmzGKdsAgI5.rst

@@ -11,7 +11,7 @@ Avoid out-or-range shifts
     :category: mandatory
     :status: draft
     :release: 1.0.0-latest
-    :fls: fls_sru4wi5jomoe
+    :fls: fls_caxn774ij8lk
     :decidability: undecidable
     :scope: module
     :tags: numerics, surprising-behavior, defect

src/coding-guidelines/expressions/gui_RHvQj8BHlz9b.rst

@@ -11,7 +11,7 @@ Do not shift an expression by a negative number of bits or by greater than or eq
     :category: advisory
     :status: draft
     :release: 1.7.0-latest
-    :fls: fls_sru4wi5jomoe
+    :fls: fls_caxn774ij8lk
     :decidability: decidable
     :scope: module
     :tags: numerics, reduce-human-error, maintainability, surprising-behavior, subset