Update Rocket.download.recipe

[paul-cossey]

Hi, @Jaharmi

The Rocket download recipe is currently failing with this error message

The following recipes failed:
    Rocket.munki.recipe
        Error in com.github.jaharmi.munki.Rocket: Processor: URLDownloader: Error: curl: (56) The requested URL returned error: 404

This PR adds in a Referer and a User Agent.

Output from a successful -v run

autopkg run -v Rocket.munki.recipe
Looking for com.github.jaharmi.download.Rocket...
Did not find com.github.jaharmi.download.Rocket in recipe map
Rebuilding recipe map with current working directories...
Looking for com.github.jaharmi.download.Rocket...
Found com.github.jaharmi.download.Rocket in recipe map
**load_recipe time: 0.007213082999442122
Processing Rocket.munki.recipe...
WARNING: Rocket.munki.recipe is missing trust info and FAIL_RECIPES_WITHOUT_TRUST_INFO is not set. Proceeding...
URLDownloader
URLDownloader: Storing new Last-Modified header: Fri, 28 Apr 2023 02:38:08 GMT
URLDownloader: Storing new ETag header: "f951ff2724c0a48870c1a621ea317244-2"
URLDownloader: Downloaded /Users/paul.cossey/Library/AutoPkg/Cache/com.github.jaharmi.munki.Rocket/downloads/Rocket.dmg
EndOfCheckPhase
CodeSignatureVerifier
CodeSignatureVerifier: Mounted disk image /Users/paul.cossey/Library/AutoPkg/Cache/com.github.jaharmi.munki.Rocket/downloads/Rocket.dmg
CodeSignatureVerifier: Verifying code signature...
CodeSignatureVerifier: Deep verification enabled...
CodeSignatureVerifier: Strict verification not defined. Using codesign defaults...
CodeSignatureVerifier: /private/tmp/dmg.i5WB6r/Rocket.app: valid on disk
CodeSignatureVerifier: /private/tmp/dmg.i5WB6r/Rocket.app: satisfies its Designated Requirement
CodeSignatureVerifier: /private/tmp/dmg.i5WB6r/Rocket.app: explicit requirement satisfied
CodeSignatureVerifier: Signature is valid
Versioner
Versioner: Mounted disk image /Users/paul.cossey/Library/AutoPkg/Cache/com.github.jaharmi.munki.Rocket/downloads/Rocket.dmg
Versioner: Found version 1.9.3 in file /Users/paul.cossey/Library/AutoPkg/Cache/com.github.jaharmi.munki.Rocket/downloads/Rocket.dmg/Rocket.app/Contents/Info.plist
MunkiImporter
MunkiImporter: Using repo lib: AutoPkgLib
MunkiImporter:         plugin: FileRepo
MunkiImporter:           repo: /Users/Shared/munki_repo
MunkiImporter: Copied pkginfo to: /Users/Shared/munki_repo/pkgsinfo/apps/Rocket/Rocket-1.9.3.plist
MunkiImporter:            pkg to: /Users/Shared/munki_repo/pkgs/apps/Rocket/Rocket-1.9.3.dmg
Receipt written to /Users/paul.cossey/Library/AutoPkg/Cache/com.github.jaharmi.munki.Rocket/receipts/Rocket.munki-receipt-20240926-102459.plist

The following new items were downloaded:
    Download Path                                                                                  
    -------------                                                                                  
    /Users/paul.cossey/Library/AutoPkg/Cache/com.github.jaharmi.munki.Rocket/downloads/Rocket.dmg  

The following new items were imported into Munki:
    Name    Version  Catalogs  Pkginfo Path                    Pkg Repo Path                 Icon Repo Path  
    ----    -------  --------  ------------                    -------------                 --------------  
    Rocket  1.9.3    testing   apps/Rocket/Rocket-1.9.3.plist  apps/Rocket/Rocket-1.9.3.dmg