i.tasscap manual: fix dash char; added authors

scripts/i.tasscap/i.tasscap.html

@@ -96,7 +96,7 @@ Results:
 <li> Sentinel-2 Tasseled Cap coefficients - Ref: Nedkov, R. (2017). Orthogonal transformation
   of segmented images from the satellite Sentinel-2.
   Comptes rendus de l'Acad&eacute;mie bulgare des sciences, 70:687-692.</li>
-<li>Yarbrough, L., Navulur, R., 2014, Presentation of the Kauth–Thomas transform
+<li>Yarbrough, L., Navulur, R., 2014, Presentation of the Kauth-Thomas transform
   for WorldView-2 reflectance data. Remote Sensing Letters. 5. DOI: 10.1080/2150704X.2014.885148.</li>
 </ul>
 
@@ -116,5 +116,11 @@ Dr. Agustin Lobo, original script, 1997
 Markus Neteler, ITC-irst, 2001
 <p>
 Converted to Python by Glynn Clements
+<p>
+Code improvements by Leonardo Perathoner
+<p>
+Sentinel-2 support by Veronica Andreo
+<p>
+Worldview-2 support by Markus Neteler
 
 <p><i>Last changed: $Date$</i>