Fix some Model docs wording;

api/init.lua

@@ -14925,7 +14925,7 @@ return {
                     {
                       name = "node",
                       type = "string | number",
-                      description = "The index of the node."
+                      description = "The name or index of a node."
                     },
                     {
                       name = "space",
@@ -14977,7 +14977,7 @@ return {
                     {
                       name = "node",
                       type = "string | number",
-                      description = "The name or index of the node."
+                      description = "The name or index of a node."
                     },
                     {
                       name = "origin",
@@ -15029,7 +15029,7 @@ return {
                     {
                       name = "node",
                       type = "string | number",
-                      description = "The index of a node."
+                      description = "The name or index of a node."
                     },
                     {
                       name = "origin",

api/lovr/graphics/Model/getNodePosition.lua

@@ -4,7 +4,7 @@ return {
   arguments = {
     node = {
       type = 'string | number',
-      description = 'The index of the node.'
+      description = 'The name or index of a node.'
     },
     space = {
       type = 'OriginType',

api/lovr/graphics/Model/getNodeScale.lua

@@ -4,7 +4,7 @@ return {
   arguments = {
     node = {
       type = 'string | number',
-      description = 'The name or index of the node.'
+      description = 'The name or index of a node.'
     },
     origin = {
       type = 'OriginType',

api/lovr/graphics/Model/getNodeTransform.lua

@@ -4,7 +4,7 @@ return {
   arguments = {
     node = {
       type = 'string | number',
-      description = 'The index of a node.'
+      description = 'The name or index of a node.'
     },
     origin = {
       type = 'OriginType',