CHARTER: s12(c): formalise charter versions and changelog

We have version numbers (and a changelog) in the Charter, so we should
probably actually enshrine that in the Charter. In addition, clean up
the changelog format so that it's easier to understand.

This change does introduce new requirements for the editors of the
Charter, but it simply mirrors the current convention applied to Charter
amendments.

Signed-off-by: Aleksa Sarai <[email protected]>

Author: cyphar

CHARTER.md

@@ -1,12 +1,18 @@
-# Open Container Initiative Charter v1.2
+# Open Container Initiative Charter v1.2+DRAFT
 
-| Comment          | Effective Date   |
-| ---------------- |:----------------:|
-| Initial release  | 13 November 2015 |
-| Update           | 18 May 2020      |
-| Update (simplify)| 4 June 2020      |
+| Version   | Notice Date | Effective Date | Changes                                  |
+| --------- | ----------- | -------------- | ---------------------------------------- |
+| 1.0       | 2015-11-13  | 2015-11-13     | *Initial release.*                       |
+| 1.1       | 2020-05-06  | 2020-06-05     | • *(Section 1)* Remove scope table. |
+| 1.2       | 2020-06-04  | 2020-07-04     | • *(Section 1)* Simplify mission.   |
+| 1.2+DRAFT |             |                | • *(Section 12)* Formalise changelog and version numbers. |
 
-##  1. Mission of the Open Container Initiative (“OCI”).
+> **NOTE**: The "notice date" is the date at which OCI Members were given
+> notice regarding the relevant changes, and the "effective date" is the date
+> when the respective version of the Charter came into effect -- in accordance
+> with Section 12 (a) of this Charter.
+
+## 1. Mission of the Open Container Initiative ("OCI")
 
 The Open Container Initiative provides an open source technical community
 within which industry participants may easily contribute to building
@@ -459,3 +465,7 @@ b. A Member may resign within such thirty-day notice period, or within the
    not have any effect on commitments made by the OCI Member or participant
    during the term of membership. Resignation may be made by email to the
    Executive Director of the Linux Foundation.
+
+c. Each version of this Charter will have a distinguishing version number, with
+   a changelog included in the preamble describing material changes to the
+   Charter.