gradle.yml: Upgrade Codecov Action

[yhtMinceraft1010X]

Fixes #127

Proposed Commit Message:

Codecov GitHub Action v1 uses a deprecated bash uploader, which may
cease to function soon. The v2 version also has a files arg instead of a
file arg, suggesting possible deprecation of the file arg.

Let's upgrade to v2, use the files arg for coverage.xml and the directory
arg for the directory in which coverage.xml is found.

[canihasreview[bot]]

Click here to submit a new iteration when this PR is ready for review.

See this repository's contribution guide for more information.

[codecov-commenter]

Codecov Report

Merging #128 (512a9b0) into master (865de62) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #128   +/-   ##
=========================================
  Coverage     72.15%   72.15%           
  Complexity      399      399           
=========================================
  Files            70       70           
  Lines          1232     1232           
  Branches        125      125           
=========================================
  Hits            889      889           
  Misses          311      311           
  Partials         32       32           

---

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[yhtMinceraft1010X]

I tried running CanIHasReview but kept getting the same error for each attempt. Here is an issue describing the error for one such attempt: https://github.com/CanIHasReview/CanIHasReview/issues/37

[damithc]

I tried running CanIHasReview but kept getting the same error for each attempt. Here is an issue describing the error for one such attempt: CanIHasReview/CanIHasReview#37

@yhtMinceraft1010X while we wait for a response from CanIHasReview maintainer, we can process this PR without CanIHasReview.

@se-edu/tech-team-level1 for your review please ...

[canihasreview[bot]]

v7

@yhtMinceraft1010X submitted v7 for review.

• [v7 1/2] Upgrade codecov action
• [v7 2/2] Switch to files arg

(:books: Archive)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/128/7/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[canihasreview[bot]]

v8

@yhtMinceraft1010X submitted v8 for review.

• [v8 1/3] Upgrade codecov action
• [v8 2/3] Switch to files arg
• [v8 3/3] Split filepath into directory and filename

(:books: Archive) (:chart_with_upwards_trend: Interdiff between v7 and v8) (:chart_with_upwards_trend: Range-Diff between v7 and v8)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/128/8/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[damithc]

@yhtMinceraft1010X Are the three commits independent incremental changes? If not, they should be in the same commit.

[canihasreview[bot]]

v9

@yhtMinceraft1010X submitted v9 for review.

• [v9 1/1] Upgrade Codecov Action

(:books: Archive) (:chart_with_upwards_trend: Interdiff between v8 and v9) (:chart_with_upwards_trend: Range-Diff between v8 and v9)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/128/9/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[damithc]

Thanks for the PR @yhtMinceraft1010X Confirmed file/files/directory are called 'flags'? Can revise the 2nd paragraph of the proposed commit message to remove the reference to RepoSense (as that project is not related to AB3)?

[yhtMinceraft1010X]

Thanks for the PR @yhtMinceraft1010X Confirmed file/files/directory are called 'flags'? Can revise the 2nd paragraph of the proposed commit message to remove the reference to RepoSense (as that project is not related to AB3)?

I realised the proper term should be args. I've made the changes in the proposed commit message.