increase enum class allowance by 1

Author: ouchadam

tools/check/forbidden_strings_in_code.txt

@@ -160,7 +160,7 @@ Formatter\.formatShortFileSize===1
 # android\.text\.TextUtils
 
 ### This is not a rule, but a warning: the number of "enum class" has changed. For Json classes, it is mandatory that they have `@JsonClass(generateAdapter = false)`. If the enum is not used as a Json class, change the value in file forbidden_strings_in_code.txt
-enum class===106
+enum class===107
 
 ### Do not import temporary legacy classes
 import org.matrix.android.sdk.internal.legacy.riot===3