Add new Sprig functions

syntax/helm.vim

@@ -70,7 +70,7 @@ hi def link     goImaginary  Number
 syn cluster     gotplLiteral     contains=goString,goRawString,goCharacter,@goInt,goFloat,goImaginary
 syn keyword     gotplControl     contained   if else end range with template include tpl required define
 syn keyword     gotplFunctions   contained   and call html index js len not or print printf println urlquery eq ne lt le gt ge
-syn keyword     goSprigFunctions contained   abbrev abbrevboth add add1 append atoi b64dec b64enc base biggest camelcase cat clean coalesce compact \contains date dateInZone dateModify default derivePassword dict dir div empty ext first float64 fromJson fromYaml genPrivateKey has hasKey hasPrefix hasSuffix htmlDate htmlDateInZone indent initial initials int int64 isAbs join keys kindIs kindOf last list lower max min mod mul nindent nospace now omit pick pluck plural prepend quote randAlpha randAlphaNum randAscii randNumeric repeat replace rest reverse set sha256sum shuffle snakecase sortAlpha split splitList squote sub substr swapcase title toJson toPrettyJson toString toStrings toToml toYaml trim trimAll trimPrefix trimSuffix trunc tuple typeIs typeIsLike typeOf uniq unset until untilStep untitle upper without wrap wrapWith
+syn keyword     goSprigFunctions contained   abbrev abbrevboth add add1 adler32sum ago append atoi b32dec b32enc b64dec b64enc base biggest buildCustomCert camelcase cat ceil clean coalesce \contains compact date dateInZone dateModify date_in_zone date_modify default derivePassword dict dir div empty env expandenv ext fail first float64 floor fromJson fromYaml genCA genPrivateKey genSelfSignedCert genSignedCert has hasKey hasPrefix hasSuffix hello htmlDate htmlDateInZone indent initial initials int int64 isAbs join kebabcase keys kindIs kindOf last list lower max merge mergeOverwrite min mod mul nindent nospace now omit pick pluck plural prepend quote randAlpha randAlphaNum randAscii randNumeric regexFind regexFindAll regexMatch regexReplaceAll regexReplaceAllLiteral regexSplit repeat replace rest reverse round semver semverCompare set sha1sum sha256sum shuffle slice snakecase sortAlpha split splitList splitn squote sub substr swapcase ternary title toDate toJson toPrettyJson toString toStrings toToml toYaml trim trimAll trimPrefix trimSuffix trimall trunc tuple typeIs typeIsLike typeOf uniq unixEpoch unset until untilStep untitle upper uuidv4 values without wrap wrapWith
 syn match       gotplVariable    contained   /\$[a-zA-Z0-9_]*\>/
 syn match       goTplIdentifier  contained   /\.[^\s}]+\>/