Fix incorrect MIME type from image/jpg to image/jpeg

According to multiple sources, both official ([IANA] and [RFC2046]) and
otherwise (eg, [Mozilla] and [Wikipedia]), the official MIME type for
JPEG images is `image/jpeg`, not `image/jpg`.  Change Hugo to match.

[IANA]: https://www.iana.org/assignments/media-types/media-types.xhtml#image
[RFC2046]: https://tools.ietf.org/html/rfc2046
[Mozilla]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
[Wikipedia]: https://en.wikipedia.org/wiki/JPEG

2 files changed, 3 insertions, 3 deletions

diff --git a/docs/content/en/content-management/image-processing/index.md b/docs/content/en/content-management/image-processing/index.md
index 53e72bee1..ed6478d7a 100644
--- a/docs/content/en/content-management/image-processing/index.md
+++ b/docs/content/en/content-management/image-processing/index.md
@@ -88,7 +88,7 @@ Sometimes it can be useful to create the filter chain once and then reuse it:
 
 Provides an [Exif](https://en.wikipedia.org/wiki/Exif) object with metadata about the image.
 
-Note that this is only suported for JPG and TIFF images, so it's recommended to wrap the access with a `with`, e.g.:
+Note that this is only suported for JPEG and TIFF images, so it's recommended to wrap the access with a `with`, e.g.:
 
 ```go-html-template
 {{ with $img.Exif }}
diff --git a/docs/content/en/content-management/page-resources.md b/docs/content/en/content-management/page-resources.md
index dcd19e42f..1a0ef1b2f 100644
--- a/docs/content/en/content-management/page-resources.md
+++ b/docs/content/en/content-management/page-resources.md
@@ -17,7 +17,7 @@ menu:
 ## Properties
 
 ResourceType
-: The main type of the resource. For example, a file of MIME type `image/jpg` has the ResourceType `image`.
+: The main type of the resource. For example, a file of MIME type `image/jpeg` has the ResourceType `image`.
 
 Name
 : Default value is the filename (relative to the owning page). Can be set in front matter.
@@ -35,7 +35,7 @@ Content
 : The content of the resource itself. For most resources, this returns a string with the contents of the file. This can be used to inline some resources, such as `<script>{{ (.Resources.GetMatch "myscript.js").Content | safeJS }}</script>` or `<img src="{{ (.Resources.GetMatch "mylogo.png").Content | base64Encode }}">`.
 
 MediaType
-: The MIME type of the resource, such as `image/jpg`.
+: The MIME type of the resource, such as `image/jpeg`.
 
 MediaType.MainType
 : The main type of the resource's MIME type. For example, a file of MIME type `application/pdf` has for MainType `application`.