DOC: fix an error in the documentation of the QGIS plugin: OTB 7.0 is compatible with QGIS 3.12
DOC: fix an error in the documentation of the QGIS plugin: OTB 7.0 is compatible with QGIS 3.12

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB