docs: fix small typos

Author: triceo

docs/src/modules/ROOT/pages/integration/integration.adoc

@@ -97,7 +97,7 @@ The `SolverConfig` resource is constructed by reading the `application.propertie
 Therefore, Domain entities (solution, entities, and constraint classes) and customized properties (`spent-limit`, etc.) for the
 planning problem are identified and loaded into the solver configuration.
 
-The available resouses can be injected as follows:
+The available resources can be injected as follows:
 
 [tabs]
 ====
@@ -293,8 +293,8 @@ Kotlin::
 @Path("path")
 class Resource {
 
-    private final var fastSolver: SolverManager<...>?
-    private final var regularSolver: SolverManager<...>?
+    private var fastSolver: SolverManager<...>?
+    private var regularSolver: SolverManager<...>?
 
     @Inject
     constructor(
@@ -405,8 +405,8 @@ class Teacher {
 @Path("path")
 class Resource {
 
-    private final var teacherToLessonScheduleSolverManager: SolverManager<TeacherToLessonSchedule, String>?
-    private final var lessonToRoomTimeslotSolverManager: SolverManager<Timetable, String>?
+    private var teacherToLessonScheduleSolverManager: SolverManager<TeacherToLessonSchedule, String>?
+    private var lessonToRoomTimeslotSolverManager: SolverManager<Timetable, String>?
 
     @Inject
     constructor(