BIP3: refer to CC0 1.0 Universal

per https://creativecommons.org/publicdomain/zero/1.0/legalcode.en

and add a missing word

Co-authored-by: Tim Ruffing <[email protected]>

Author: jonatack

bip-0003.md

@@ -396,7 +396,7 @@ For example, a preamble might include the following License header:
 
     License: CC0-1.0 OR MIT
 
-In this case, the BIP (including all auxiliary files) is made available under the terms of both Creative Commons CC0 1.0 Universal as well as the
+In this case, the BIP (including all auxiliary files) is made available under the terms of both CC0 1.0 Universal as well as the
 MIT License, and anyone may modify and redistribute it provided they comply with the terms of
 *either* license, at their option. In other words, the license list is an "OR choice", not an "AND also" requirement. See the [SPDX
 documentation](https://spdx.dev/ids/) and the [SPDX License List](https://spdx.org/licenses/) for further details.
@@ -426,7 +426,7 @@ acceptable license L from the following list and another SPDX License Expression
 
 * BSD-2-Clause: [BSD 2-Clause License](https://opensource.org/licenses/BSD-2-Clause)
 * BSD-3-Clause: [BSD 3-Clause License](https://opensource.org/licenses/BSD-3-Clause)
-* CC0-1.0: [Creative Commons CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/)
+* CC0-1.0: [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/)
 * FSFAP: [FSF All Permissive License](https://www.gnu.org/prep/maintain/html_node/License-Notices-for-Other-Files.html)
 * CC-BY-4.0: [Creative Commons Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/)
 * MIT: [Expat/MIT/X11 License](https://opensource.org/licenses/MIT)
@@ -436,7 +436,7 @@ acceptable license L from the following list and another SPDX License Expression
 #### Not Acceptable Licenses
 
 All licenses not explicitly included in the above lists are not acceptable terms for a Bitcoin Improvement Proposal.
-However, BIPs predating this proposal were accepted under other terms, and should use one the following identifiers.
+However, BIPs predating this proposal were accepted under other terms, and should use one of the following identifiers.
 
 * LicenseRef-PD: Placed into the public domain
 * OPUBL-1.0: [Open Publication License 1.0](https://opencontent.org/openpub/)