[WebKit checkers] fix a typo in a message in one of the checkers (#159593)

Author: csaavedra

clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefCallArgsChecker.cpp

@@ -384,7 +384,7 @@ class RawPtrRefCallArgsChecker
 
     SmallString<100> Buf;
     llvm::raw_svector_ostream Os(Buf);
-    Os << "Reciever is " << ptrKind() << " and unsafe.";
+    Os << "Receiver is " << ptrKind() << " and unsafe.";
 
     PathDiagnosticLocation BSLoc(SrcLocToReport, BR->getSourceManager());
     auto Report = std::make_unique<BasicBugReport>(Bug, Os.str(), BSLoc);

clang/test/Analysis/Checkers/WebKit/unretained-call-args.mm

@@ -279,7 +279,7 @@ void foo() {
 
   void foo() {
     [provide() doWork];
-    // expected-warning@-1{{Reciever is unretained and unsafe}}
+    // expected-warning@-1{{Receiver is unretained and unsafe}}
     [protectedProvide().get() doWork];
 
     CFArrayAppendValue(provide_cf(), nullptr);