python3: Fix typo in create_manifest3.py

Fixed a misspelled "posible" to "possible".

(From OE-Core rev: 7e2d743e4809d6cbaa8e441dc42624eb65daad63)

Signed-off-by: Omri Sarig <omri.sarig13@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3/create_manifest3.py

@@ -1,7 +1,7 @@
 # This script is used as a bitbake task to create a new python manifest
 # $ bitbake python -c create_manifest
 #
-# Our goal is to keep python-core as small as posible and add other python
+# Our goal is to keep python-core as small as possible and add other python
 # packages only when the user needs them, hence why we split upstream python
 # into several packages.
 #