Update LenseInfo name and type to match specification

src/ImageSharp/Metadata/Profiles/Exif/ExifTags.cs

@@ -225,7 +225,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
                 case ExifTagValue.ImageUniqueID:
                 case ExifTagValue.OwnerName:
                 case ExifTagValue.SerialNumber:
-                case ExifTagValue.LensInfo:
+                case ExifTagValue.LensSpecification:
                 case ExifTagValue.LensMake:
                 case ExifTagValue.LensModel:
                 case ExifTagValue.LensSerialNumber:

src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTag.Rational.cs

@@ -131,11 +131,6 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
         /// </summary>
         public static ExifTag<Rational> DigitalZoomRatio { get; } = new ExifTag<Rational>(ExifTagValue.DigitalZoomRatio);
 
-        /// <summary>
-        /// Gets the LensInfo exif tag.
-        /// </summary>
-        public static ExifTag<Rational> LensInfo { get; } = new ExifTag<Rational>(ExifTagValue.LensInfo);
-
         /// <summary>
         /// Gets the GPSAltitude exif tag.
         /// </summary>

src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTag.RationalArray.cs

@@ -50,5 +50,10 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
         /// Gets the GPSDestLongitude exif tag.
         /// </summary>
         public static ExifTag<Rational[]> GPSDestLongitude { get; } = new ExifTag<Rational[]>(ExifTagValue.GPSDestLongitude);
+
+        /// <summary>
+        /// Gets the LensSpecification exif tag.
+        /// </summary>
+        public static ExifTag<Rational[]> LensSpecification { get; } = new ExifTag<Rational[]>(ExifTagValue.LensSpecification);
     }
 }

src/ImageSharp/Metadata/Profiles/Exif/Tags/ExifTagValue.cs

@@ -1356,9 +1356,9 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
         SerialNumber = 0xA431,
 
         /// <summary>
-        /// LensInfo
+        /// LensSpecification
         /// </summary>
-        LensInfo = 0xA432,
+        LensSpecification = 0xA432,
 
         /// <summary>
         /// LensMake

src/ImageSharp/Metadata/Profiles/Exif/Values/ExifValues.cs

@@ -129,7 +129,6 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
                 case ExifTagValue.FocalPlaneYResolution: return new ExifRational(ExifTag.FocalPlaneYResolution);
                 case ExifTagValue.ExposureIndex: return new ExifRational(ExifTag.ExposureIndex);
                 case ExifTagValue.DigitalZoomRatio: return new ExifRational(ExifTag.DigitalZoomRatio);
-                case ExifTagValue.LensInfo: return new ExifRational(ExifTag.LensInfo);
                 case ExifTagValue.GPSAltitude: return new ExifRational(ExifTag.GPSAltitude);
                 case ExifTagValue.GPSDOP: return new ExifRational(ExifTag.GPSDOP);
                 case ExifTagValue.GPSSpeed: return new ExifRational(ExifTag.GPSSpeed);
@@ -147,6 +146,7 @@ namespace SixLabors.ImageSharp.Metadata.Profiles.Exif
                 case ExifTagValue.GPSTimestamp: return new ExifRationalArray(ExifTag.GPSTimestamp);
                 case ExifTagValue.GPSDestLatitude: return new ExifRationalArray(ExifTag.GPSDestLatitude);
                 case ExifTagValue.GPSDestLongitude: return new ExifRationalArray(ExifTag.GPSDestLongitude);
+                case ExifTagValue.LensSpecification: return new ExifRationalArray(ExifTag.LensSpecification);
 
                 case ExifTagValue.OldSubfileType: return new ExifShort(ExifTag.OldSubfileType);
                 case ExifTagValue.Compression: return new ExifShort(ExifTag.Compression);

tests/ImageSharp.Tests/Metadata/Profiles/Exif/Values/ExifValuesTests.cs

@@ -122,7 +122,6 @@ namespace SixLabors.ImageSharp.Tests.Metadata.Profiles.Exif.Values
             { ExifTag.FocalPlaneYResolution },
             { ExifTag.ExposureIndex },
             { ExifTag.DigitalZoomRatio },
-            { ExifTag.LensInfo },
             { ExifTag.GPSAltitude },
             { ExifTag.GPSDOP },
             { ExifTag.GPSSpeed },
@@ -142,7 +141,8 @@ namespace SixLabors.ImageSharp.Tests.Metadata.Profiles.Exif.Values
             { ExifTag.GPSLongitude },
             { ExifTag.GPSTimestamp },
             { ExifTag.GPSDestLatitude },
-            { ExifTag.GPSDestLongitude }
+            { ExifTag.GPSDestLongitude },
+            { ExifTag.LensSpecification }
         };
 
         public static TheoryData<ExifTag> ShortTags => new TheoryData<ExifTag>