fix typo in the documentation of CModMulK (#1594)

Author: NoureldinYosri

qualtran/bloqs/mod_arithmetic/mod_multiplication.ipynb

@@ -157,7 +157,7 @@
     "## `CModMulK`\n",
     "Perform controlled modular multiplication by a constant.\n",
     "\n",
-    "Applies $\\ket{c}\\ket{c} \\rightarrow \\ket{c} \\ket{x*k^c \\mod p}$.\n",
+    "Applies $\\ket{c}\\ket{x} \\rightarrow \\ket{c} \\ket{x*k^c \\mod p}$.\n",
     "\n",
     "#### Parameters\n",
     " - `dtype`: Dtype of the register.\n",

qualtran/bloqs/mod_arithmetic/mod_multiplication.py

@@ -175,7 +175,7 @@ def _moddbl_large() -> ModDbl:
 class CModMulK(Bloq):
     r"""Perform controlled modular multiplication by a constant.
 
-    Applies $\ket{c}\ket{c} \rightarrow \ket{c} \ket{x*k^c \mod p}$.
+    Applies $\ket{c}\ket{x} \rightarrow \ket{c} \ket{x*k^c \mod p}$.
 
     Args:
         dtype: Dtype of the register.