PEP 1: Add 'Finding a sponsor' heading (#5201)

Co-authored-by: Stan Ulbrych <stan@python.org>

Author: hugovk

peps/pep-0001.rst

@@ -157,8 +157,8 @@ PEP to make properly formatted, of high quality, and to address
 initial concerns about the proposal.
 
 
-Submitting a PEP
-----------------
+Finding a sponsor
+-----------------
 
 Following the above initial discussion, a *sponsor* must be found for the PEP.
 If one or more of the PEP's co-authors qualify as a sponsor, they are responsible
@@ -179,6 +179,10 @@ sponsor does **not** disqualify that person from becoming a co-author or
 PEP-Delegate later on.  The sponsor of a PEP is recorded in the
 "Sponsor:" field of the header.
 
+
+Submitting a PEP
+----------------
+
 Once the sponsor or the core developer(s) co-authoring the PEP deem the PEP
 ready for submission, the proposal should be submitted as a draft PEP via a
 `GitHub pull request`_.  The draft must be written in PEP style as described