fix CircleCI and Github Actions build commands

[KensukeTakahara]

Fixes #2394.

I just ran the following command.

yarn install
git add ./yarn.lock
git commit -m "fix yarn.lock."

[slsnextbot]

Handler Size Report

There are changes to handler sizes. Please review.

Base Handler Sizes (kB) (commit 3d3f82d)

{}

New Handler Sizes (kB) (commit 680e177)

{
    "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 #2395 (680e177) into master (1e1e7c1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2395   +/-   ##
=======================================
  Coverage   83.77%   83.77%           
=======================================
  Files         102      102           
  Lines        3697     3697           
  Branches     1186     1186           
=======================================
  Hits         3097     3097           
  Misses        588      588           
  Partials       12       12           

---

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[KensukeTakahara]

@dphang
I fixed CircleCI and Github Actions build commands.
It is difficult to contribute in the current master branch.
Please review this PR.