[solarforecast] Fix documentation typo (openhab#16799)

* fixed typo

Signed-off-by: Michael Weger <weger.michael@gmx.net>

bundles/org.openhab.binding.solarforecast/README.md

@@ -268,7 +268,7 @@ Number:Energy ForecastSolarHome_Actual_SW "SW Today's forecast
 Number:Energy ForecastSolarHome_Remaining_SW "SW Today's remaining forecast till sunset" { channel="solarforecast:fs-plane:homeSite:homeSouthWest:energy-remain", stateDescription=" "[ pattern="%.3f %unit%" ], unit="kWh" } 
 Number:Energy ForecastSolarHome_Today_SW "SW Today's total energy forecast" { channel="solarforecast:fs-plane:homeSite:homeSouthWest:energy-today", stateDescription=" "[ pattern="%.1f %unit%" ], unit="kWh" } 
 
-// estimaion items
+// estimation items
 Group influxdb
 Number:Power ForecastSolarHome_Power_Estimate "Power estimations" (influxdb) { channel="solarforecast:fs-site:homeSite:power-estimate", stateDescription=" "[ pattern="%.0f %unit%" ], unit="W" } 
 Number:Energy ForecastSolarHome_Energy_Estimate "Energy estimations" (influxdb) { channel="solarforecast:fs-site:homeSite:energy-estimate", stateDescription=" "[ pattern="%.3f %unit%" ], unit="kWh" }