chore: Use RFD #1 for "Establishing the RFD Process"

Per the RFD rules, assign ID #1 to the first RFD.

Signed-off-by: Andrew Lilley Brinker <abrinker@mitre.org>

Author: alilleybrinker

rfds/0000-establishing-the-rfd-process.md rfds/0001-establishing-the-rfd-process.mdrfds/0000-establishing-the-rfd-process.md renamed to rfds/0001-establishing-the-rfd-process.md

@@ -3,7 +3,7 @@
 | Field            | Value                 |
 |:-----------------|:----------------------|
 | RFD Submitter    | Andrew Lilley Brinker |
-| RFD Pull Request | [RFD #0000](https://github.com/CVEProject/cve-schema/pull/405) |
+| RFD Pull Request | [RFD #0001](https://github.com/CVEProject/cve-schema/blob/main/rfds/0001-establishing-the-rfd-process.md) |
 
 ## Summary
 [summary]: #summary