Match viewport units rename in web-features (#22943)

Matches web-platform-dx/web-features#959.

Author: foolip

css/types/length.json

@@ -559,7 +559,7 @@
           "__compat": {
             "description": "<code>vb</code> unit",
             "tags": [
-              "web-features:viewport-relative-unit-variants"
+              "web-features:viewport-unit-variants"
             ],
             "support": {
               "chrome": {
@@ -595,7 +595,7 @@
           "__compat": {
             "description": "<code>vh</code> unit",
             "tags": [
-              "web-features:viewport-relative-units"
+              "web-features:viewport-units"
             ],
             "support": {
               "chrome": {
@@ -636,7 +636,7 @@
           "__compat": {
             "description": "<code>vi</code> unit",
             "tags": [
-              "web-features:viewport-relative-unit-variants"
+              "web-features:viewport-unit-variants"
             ],
             "support": {
               "chrome": {
@@ -672,7 +672,7 @@
           "__compat": {
             "description": "<code>dvb</code>, <code>dvh</code>, <code>dvi</code>, <code>dvmax</code>, <code>dvmin</code>, <code>dvw</code> units",
             "tags": [
-              "web-features:viewport-relative-unit-variants"
+              "web-features:viewport-unit-variants"
             ],
             "support": {
               "chrome": {
@@ -708,7 +708,7 @@
           "__compat": {
             "description": "<code>lvb</code>, <code>lvh</code>, <code>lvi</code>, <code>lvmax</code>, <code>lvmin</code>, <code>lvw</code> units",
             "tags": [
-              "web-features:viewport-relative-unit-variants"
+              "web-features:viewport-unit-variants"
             ],
             "support": {
               "chrome": {
@@ -744,7 +744,7 @@
           "__compat": {
             "description": "<code>svb</code>, <code>svh</code>, <code>svi</code>, <code>svmax</code>, <code>svmin</code>, <code>svw</code> units",
             "tags": [
-              "web-features:viewport-relative-unit-variants"
+              "web-features:viewport-unit-variants"
             ],
             "support": {
               "chrome": {
@@ -780,7 +780,7 @@
           "__compat": {
             "description": "<code>vmax</code> unit",
             "tags": [
-              "web-features:viewport-relative-units"
+              "web-features:viewport-units"
             ],
             "support": {
               "chrome": {
@@ -821,7 +821,7 @@
           "__compat": {
             "description": "<code>vmin</code> unit",
             "tags": [
-              "web-features:viewport-relative-units"
+              "web-features:viewport-units"
             ],
             "support": {
               "chrome": {
@@ -872,7 +872,7 @@
           "__compat": {
             "description": "<code>vw</code> unit",
             "tags": [
-              "web-features:viewport-relative-units"
+              "web-features:viewport-units"
             ],
             "support": {
               "chrome": {