PEP 770: Remove MUST for JSON+UTF-8, fix typo (#4201)

Author: sethmlarson

peps/pep-0770.rst

@@ -214,9 +214,6 @@ Any characters or character sequences not covered by this specification are
 invalid. Projects MUST NOT use such values. Tools consuming this field SHOULD
 reject invalid values with an error.
 
-Tools MUST assume that SBOM file content is valid UTF-8 encoded JSON, and SHOULD
-validate this an raise an error for invalid formats and encodings.
-
 Literal paths (e.g. ``bom.cdx.json``) are treated as valid globs which means
 they can also be defined.
 
@@ -257,7 +254,7 @@ Examples of invalid SBOM files declarations:
     [project]
     sbom-files = ["..\bom.json"]
 
-Reason: ``..`` must not be used. ``\\`` is an invalid path delimited, ``/``
+Reason: ``..`` must not be used. ``\\`` is an invalid path delimiter, ``/``
 must be used.
 
 .. code-block:: toml