[3.12] Fix typo in typing docs: Remove redundant backtick (GH-108559) (#108560)

Fix typo in typing docs: Remove redundant backtick (GH-108559)
(cherry picked from commit 72b615a)

Co-authored-by: nikkie <[email protected]>

Author: miss-islington

Doc/library/typing.rst

@@ -462,7 +462,7 @@ contrast, a variable annotated with ``type[C]`` (or
 themselves -- specifically, it will accept the *class object* of ``C``. For
 example::
 
-   a = 3         # Has type ``int```
+   a = 3         # Has type ``int``
    b = int       # Has type ``type[int]``
    c = type(a)   # Also has type ``type[int]``