docs: Document the optional "colorspace" parameter for texture funcs (#1969)

Signed-off-by: Larry Gritz <[email protected]>

Author: lgritz

src/doc/stdlib.md

@@ -943,6 +943,14 @@ the computations are performed component-by-component (separately for `x`,
       : The value to return for any channels that are requested,
         but not present in the texture file (default: 0).
 
+    `"interp",` *`string`*
+      : Overrides the texture interpolation method: `"smartcubic"` (the
+        default), `"cubic"`, `"linear"`, or `"closest"`.
+
+    `"colorspace"`, *`string`*
+      : Specifies the color space of the data in the texture file.
+        (This option was added to OSL in version 1.14.)
+
     `"missingcolor",` *`color`*, `"missingalpha",` *`float`*
       : If present, supplies a missing color (and alpha value) that will
         be used for missing or broken textures -- *instead of* treating
@@ -962,10 +970,6 @@ the computations are performed component-by-component (separately for `x`,
         calls to the renderer, thus leaving it up to the shader to handle any
         errors. The error message stored will be `""` if no error occurred.
 
-    `"interp",` *`string`*
-      : Overrides the texture interpolation method: `"smartcubic"` (the 
-        default), `"cubic"`, `"linear"`, or `"closest"`.
-
 
 *`type`* **`texture3d`** `(string filename, point p,` *`...params...`* `)` <br> *`type`* **`texture3d`** `(string filename, point p, vector dpdx, vector dpdy, vector dpdz,` *`...params...`* `)`
 
@@ -1034,6 +1038,10 @@ the computations are performed component-by-component (separately for `x`,
         as an error, you must not supply the optional ``"missingcolor"``
         parameter.
 
+    `"colorspace"`, *`string`*
+      : Specifies the color space of the data in the texture file.
+        (This option was added to OSL in version 1.14.)
+
     `"time"`, *`float`*
       : A time value to use if the volume texture specifies a time-varying
         local transformation (default: 0).
@@ -1095,6 +1103,10 @@ the computations are performed component-by-component (separately for `x`,
         as an error, you must not supply the optional `"missingcolor"`
         parameter.
 
+    `"colorspace"`, *`string`*
+      : Specifies the color space of the data in the texture file.
+        (This option was added to OSL in version 1.14.)
+
     "alpha", *`floatvariable`*
       : The alpha channel (presumed to be the next channel following the
         channels returned by the `environment()` call) will be stored in the