Prepare for 1.7.0 release. (#341)

Signed-off-by: Oliver Chang <ochang@google.com>

Author: oliverchang

CHANGELOG.md

@@ -37,4 +37,5 @@
   prefixes.
 - 2024-09-12 Released version 1.6.6. Add RHBA, RHEA, SUSE-OU prefixes.
 - 2024-09-16 Released version 1.6.7. JSON schema and minor text formatting changes.
-- 2024-TBD Released version 1.6.8. Add `upstream` field.
+- 2025-03-05 Released version 1.7.0. Add `upstream` field, `V8-` ID prefix,
+  Kubernetes ecosystem, `Ubuntu` severity type.

docs/schema.md

@@ -8,7 +8,7 @@ aside:
 show_edit_on_github: true
 ---
 
-**Version 1.6.8 (Dec 4, 2024)**
+**Version 1.7.0 (March 5, 2025)**
 
 Original authors:
 - Oliver Chang (ochang@google.com)

validation/schema.json

@@ -379,7 +379,8 @@
       "type": "string",
       "title": "Currently supported home database identifier prefixes",
       "description": "These home databases are also documented at https://ossf.github.io/osv-schema/#id-modified-fields",
-      "pattern": "^(ASB-A|PUB-A|ALSA|ALBA|ALEA|BIT|CGA|CURL|CVE|DSA|DLA|ELA|DTSA|GHSA|GO|GSD|HSEC|KUBE|LBSEC|MAL|MGASA|OSV|openSUSE-SU|PHSA|PSF|PYSEC|RHBA|RHEA|RHSA|RLSA|RXSA|RSEC|RUSTSEC|SUSE-[SRFO]U|UBUNTU|USN|V8)-"    },
+      "pattern": "^(ASB-A|PUB-A|ALSA|ALBA|ALEA|BIT|CGA|CURL|CVE|DSA|DLA|ELA|DTSA|GHSA|GO|GSD|HSEC|KUBE|LBSEC|MAL|MGASA|OSV|openSUSE-SU|PHSA|PSF|PYSEC|RHBA|RHEA|RHSA|RLSA|RXSA|RSEC|RUSTSEC|SUSE-[SRFO]U|UBUNTU|USN|V8)-"
+    },
     "severity": {
       "type": [
         "array",