[MINOR][TYPO] Fix typos: runnning and Excecutors

## What changes were proposed in this pull request?

Fix typos

## How was this patch tested?

Existing tests

Author: Andrew Ash <andrew@andrewash.com>

Closes #18996 from ash211/patch-2.

resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala

@@ -551,8 +551,8 @@ private[yarn] class YarnAllocator(
           updateInternalState()
         }
       } else {
-        logInfo(("Skip launching executorRunnable as runnning Excecutors count: %d " +
-          "reached target Executors count: %d.").format(
+        logInfo(("Skip launching executorRunnable as running executors count: %d " +
+          "reached target executors count: %d.").format(
           numExecutorsRunning.get, targetNumExecutors))
       }
     }