Fix: wrong replace causing "on" files on S3

[JanStevens]

Fix the regex to only replace .js at the end of the string

Fixes #2349

[dphang]

thanks. @JanStevens can you rebase since the lockfile has been fixed on master

[slsnextbot]

Handler Size Report

No changes to handler sizes.

Base Handler Sizes (kB) (commit ec98072)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1524,
            "Minified": 668
        },
        "Image Lambda": {
            "Standard": 1488,
            "Minified": 800
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1534,
            "Minified": 674
        },
        "Default Lambda V2": {
            "Standard": 1526,
            "Minified": 670
        },
        "API Lambda": {
            "Standard": 634,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1496,
            "Minified": 805
        },
        "Regeneration Lambda": {
            "Standard": 1187,
            "Minified": 546
        },
        "Regeneration Lambda V2": {
            "Standard": 1253,
            "Minified": 573
        }
    }
}

New Handler Sizes (kB) (commit 99094e2)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1524,
            "Minified": 668
        },
        "Image Lambda": {
            "Standard": 1488,
            "Minified": 800
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1534,
            "Minified": 674
        },
        "Default Lambda V2": {
            "Standard": 1526,
            "Minified": 670
        },
        "API Lambda": {
            "Standard": 634,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1496,
            "Minified": 805
        },
        "Regeneration Lambda": {
            "Standard": 1187,
            "Minified": 546
        },
        "Regeneration Lambda V2": {
            "Standard": 1253,
            "Minified": 573
        }
    }
}

[codecov]

Codecov Report

Merging #2392 (99094e2) into master (ec98072) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2392   +/-   ##
=======================================
  Coverage   83.77%   83.77%           
=======================================
  Files         102      102           
  Lines        3697     3697           
  Branches     1186     1186           
=======================================
  Hits         3097     3097           
  Misses        588      588           
  Partials       12       12           

Impacted Files	Coverage Δ
...es/libs/lambda-at-edge/src/regeneration-handler.ts	100.00% <ø> (ø)

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[JanStevens]

@dphang done 🎉