bip3: a couple nits #1804

1. 
   darosior commented at 3:57 pm on March 28, 2025: member

   A couple of tiny changes as i was reading the BIP from top to bottom. See commit messages for details.
2. bip3: rename 'shareholder' to 'stakeholder'

   Shareholder refers to an individual or a legal entity owning a share of a company's share capital.
   Since the Bitcoin system is not a company, but different actors across the industry have a stake in
   its operation, i think the word "stakeholder" better conveys the intended meaning of the original
   author here.

   617db7a0fe
3. bip3: link to ownership transfer section for complete->closed transition

   Reading from top to bottom, the passive voice "they become BIP's author or deputy" left me wondering
   how it would concretely work in practice. Link to the transferring ownership section for
   clarification.

   5dcb2d46c9
4. 
   jonatack commented at 7:47 pm on March 28, 2025: member

   LGTM. WDYT @murchandamus?
5. jonatack added the label Proposed BIP modification on Mar 28, 2025
6. jonatack added the label Pending acceptance on Mar 28, 2025
7. murchandamus approved
8. 
   murchandamus commented at 8:25 pm on March 28, 2025: contributor

   LGTM, thanks
9. murchandamus merged this on Mar 28, 2025
10. murchandamus closed this on Mar 28, 2025

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11. murchandamus removed the label Pending acceptance on Mar 28, 2025

Contributors
darosior jonatack murchandamus

Labels
Proposed BIP modification