docs: update readme

Author: christopher-exx

README.md

@@ -329,7 +329,6 @@ The following tests are not yet implemented and therefore missing:
 - Mandatory Test 6.1.44
 - Mandatory Test 6.1.45
 - Mandatory Test 6.1.46
-- Mandatory Test 6.1.47
 - Mandatory Test 6.1.48
 - Mandatory Test 6.1.49
 - Mandatory Test 6.1.50
@@ -435,6 +434,7 @@ export const mandatoryTest_6_1_38: DocumentTest
 export const mandatoryTest_6_1_39: DocumentTest
 export const mandatoryTest_6_1_40: DocumentTest
 export const mandatoryTest_6_1_41: DocumentTest
+export const mandatoryTest_6_1_47: DocumentTest
 ```
 
 [(back to top)](#bsi-csaf-validator-lib)