[SPARK-46624][BUILD] Upgrade joda-time to 2.12.6

### What changes were proposed in this pull request?
This pr aims to upgrade  joda-time  from 2.12.5 to 2.12.6

### Why are the changes needed?
The new version brings the following fixes:
- JodaOrg/joda-time#733
- JodaOrg/joda-time#755
- JodaOrg/joda-time#731

The full release notes as follows:
- https://github.com/JodaOrg/joda-time/releases/tag/v2.12.6

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
Pass GitHub Actions

### Was this patch authored or co-authored using generative AI tooling?
No

Closes #44626 from LuciferYang/SPARK-46624.

Authored-by: yangjie01 <yangjie01@baidu.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

R/pkg/R/functions.R

@@ -1091,6 +1091,20 @@ setMethod("dayofyear",
             column(jc)
           })
 
+#' @details
+#' \code{monthname}: Extracts the three-letter abbreviated month name from a
+#' given date/timestamp/string.
+#'
+#' @rdname column_datetime_functions
+#' @aliases monthname monthname,Column-method
+#' @note monthname since 4.0.0
+setMethod("monthname",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "monthname", x@jc)
+            column(jc)
+          })
+
 #' @details
 #' \code{decode}: Computes the first argument into a string from a binary using the provided
 #' character set.

R/pkg/R/generics.R

@@ -1020,6 +1020,10 @@ setGeneric("dayofweek", function(x) { standardGeneric("dayofweek") })
 #' @name NULL
 setGeneric("dayofyear", function(x) { standardGeneric("dayofyear") })
 
+#' @rdname column_datetime_functions
+#' @name NULL
+setGeneric("monthname", function(x) { standardGeneric("monthname") })
+
 #' @rdname column_string_functions
 #' @name NULL
 setGeneric("decode", function(x, charset) { standardGeneric("decode") })

R/pkg/tests/fulltests/test_sparkSQL.R

@@ -1414,7 +1414,7 @@ test_that("test HiveContext", {
 
     # Invalid mode
     expect_error(saveAsTable(df, "parquetest", "parquet", mode = "abc", path = parquetDataPath),
-                 "illegal argument - Unknown save mode: abc")
+                 "Error in mode : analysis error - \\[INVALID_SAVE_MODE\\].*")
     unsetHiveContext()
   }
 })
@@ -2062,6 +2062,7 @@ test_that("date functions on a DataFrame", {
   expect_equal(collect(select(df, weekofyear(df$b)))[, 1], c(50, 50, 51))
   expect_equal(collect(select(df, year(df$b)))[, 1], c(2012, 2013, 2014))
   expect_equal(collect(select(df, month(df$b)))[, 1], c(12, 12, 12))
+  expect_equal(collect(select(df, monthname(df$b)))[, 1], c("Dec", "Dec", "Dec"))
   expect_equal(collect(select(df, last_day(df$b)))[, 1],
                c(as.Date("2012-12-31"), as.Date("2013-12-31"), as.Date("2014-12-31")))
   expect_equal(collect(select(df, next_day(df$b, "MONDAY")))[, 1],