Update of ED report from new reffy run

Using reffy commit 18.3.0.

Author: reffy-bot

ed/headings/vc-data-integrity.json

@@ -267,75 +267,82 @@
       "title": "Agility and Layering",
       "number": "5.4"
     },
+    {
+      "id": "safer-abstractions",
+      "href": "https://w3c.github.io/vc-data-integrity/#safer-abstractions",
+      "level": 3,
+      "title": "Safer Abstractions",
+      "number": "5.5"
+    },
     {
       "id": "transformations",
       "href": "https://w3c.github.io/vc-data-integrity/#transformations",
       "level": 3,
       "title": "Transformations",
-      "number": "5.5"
+      "number": "5.6"
     },
     {
       "id": "protected-information",
       "href": "https://w3c.github.io/vc-data-integrity/#protected-information",
       "level": 3,
       "title": "Protected Information",
-      "number": "5.6"
+      "number": "5.7"
     },
     {
       "id": "data-opacity",
       "href": "https://w3c.github.io/vc-data-integrity/#data-opacity",
       "level": 3,
       "title": "Data Opacity",
-      "number": "5.7"
+      "number": "5.8"
     },
     {
       "id": "verification-method-binding",
       "href": "https://w3c.github.io/vc-data-integrity/#verification-method-binding",
       "level": 3,
       "title": "Verification Method Binding",
-      "number": "5.8"
+      "number": "5.9"
     },
     {
       "id": "verification-relationship-validation",
       "href": "https://w3c.github.io/vc-data-integrity/#verification-relationship-validation",
       "level": 3,
       "title": "Verification Relationship Validation",
-      "number": "5.9"
+      "number": "5.10"
     },
     {
       "id": "proof-purpose-validation",
       "href": "https://w3c.github.io/vc-data-integrity/#proof-purpose-validation",
       "level": 3,
       "title": "Proof Purpose Validation",
-      "number": "5.10"
+      "number": "5.11"
     },
     {
       "id": "canonicalization-method-security",
       "href": "https://w3c.github.io/vc-data-integrity/#canonicalization-method-security",
       "level": 3,
       "title": "Canonicalization Method Security",
-      "number": "5.11"
+      "number": "5.12"
     },
     {
       "id": "canonicalization-method-correctness",
       "href": "https://w3c.github.io/vc-data-integrity/#canonicalization-method-correctness",
       "level": 3,
       "title": "Canonicalization Method Correctness",
-      "number": "5.12"
+      "number": "5.13"
     },
     {
       "id": "network-requests",
       "href": "https://w3c.github.io/vc-data-integrity/#network-requests",
       "level": 3,
       "title": "Network Requests",
-      "number": "5.13"
+      "number": "5.14"
     },
     {
       "id": "other-security-considerations",
       "href": "https://w3c.github.io/vc-data-integrity/#other-security-considerations",
       "level": 3,
       "title": "Other Security Considerations",
-      "number": "5.14"
+      "number": "5.15"
     },
     {
       "id": "privacy-considerations",