[SPARKR] [MINOR] Get rid of a long line warning

```
R/functions.R:74:1: style: lines should not be more than 100 characters.
            jc <- callJStatic("org.apache.spark.sql.functions", "lit", ifelse(class(x) == "Column", xjc, x))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8297 from yu-iskw/minor-lint-r.

(cherry picked from commit b4b35f1)
Signed-off-by: Shivaram Venkataraman <shivaram@cs.berkeley.edu>

R/pkg/R/functions.R

@@ -71,7 +71,9 @@ createFunctions()
 #' @return Creates a Column class of literal value.
 setMethod("lit", signature("ANY"),
           function(x) {
-            jc <- callJStatic("org.apache.spark.sql.functions", "lit", ifelse(class(x) == "Column", x@jc, x))
+            jc <- callJStatic("org.apache.spark.sql.functions",
+                              "lit",
+                              ifelse(class(x) == "Column", x@jc, x))
             column(jc)
           })