CakeBuild: Revert "task" -> "target"

CakeBuild always expects main task to be defined in "target" argument, see
https://cakebuild.net/docs/writing-builds/running-targets

.github/workflows/build_be.yml

@@ -44,7 +44,7 @@ jobs:
         env:
           BEPIN_DEV_NUGET_KEY: ${{ secrets.BEPIN_DEV_NUGET_KEY }}
         run: |
-          ./build.sh --task=Pack --bleeding_edge=${{ steps.be_status.outputs.is_be == 'true' }} --build_id=${{ steps.info.outputs.build_id || 0 }} --last_build_commit=\"${{ steps.last_successful_commit.outputs.commit_hash }}\" --nuget_push_key=\"${BEPIN_DEV_NUGET_KEY}\"
+          ./build.sh --target=Pack --bleeding_edge=${{ steps.be_status.outputs.is_be == 'true' }} --build_id=${{ steps.info.outputs.build_id || 0 }} --last_build_commit=\"${{ steps.last_successful_commit.outputs.commit_hash }}\" --nuget_push_key=\"${BEPIN_DEV_NUGET_KEY}\"
       - name: Upload to BepisBuilds
         env:
           BEPISBUILDS_HOST: ${{ secrets.BEPISBUILDS_HOST }}

.github/workflows/build_pr.yml

@@ -15,7 +15,7 @@ jobs:
           dotnet-version: "6.0.x"
       - name: Build
         run: |
-          ./build.sh --task=Pack
+          ./build.sh --target=Pack
       - name: Upload Artifacts
         uses: actions/upload-artifact@v2.2.4
         with:

BUILDING.md

@@ -14,7 +14,7 @@ Clone this repository via `git clone https://github.com/BepInEx/BepInEx.git`.
 After that, run in the repository directory
 
 ```bat
-build.bat --task=Build
+build.bat --target=Build
 ```
 
 ### Windows (PowerShell)
@@ -23,7 +23,7 @@ Clone this repository via `git clone https://github.com/BepInEx/BepInEx.git`.
 After that, run in the repository directory
 
 ```ps
-./build.ps1 --task=Build
+./build.ps1 --target=Build
 ```
 
 Make sure you have the execution policy set to enable running scripts.
@@ -34,14 +34,14 @@ Clone this repository via `git clone https://github.com/BepInEx/BepInEx.git`.
 After that, run in the repository directory
 
 ```sh
-./build.sh --task=Build
+./build.sh --target=Build
 ```
 
-### Additional build tasks
+### Additional build targets
 
-The build script provides the following build tasks (that you can pass via the `task` parameter)
+The build script provides the following build targets (that you can pass via the `target` parameter)
 
-| Task          | Description                                                              |
+| Target          | Description                                                              |
 | ------------- | ------------------------------------------------------------------------ |
 | `Build`       | Pulls dependencies and builds BepInEx                                    |
 | `MakeDist`    | Runs `Build` and creates distributable packages into `bin/dist` folder   |