udpate install swift workflow

Author: rauhul

.github/actions/install-swift/action.yml

@@ -4,13 +4,6 @@ description: Installs the Swift specified by a .swift-version file
 runs:
   using: "composite"
   steps:
-    # - name: "Cache: Swift"
-    #   id: cache-swift
-    #   uses: actions/cache@v4
-    #   with:
-    #     path: "$HOME/.local/share/swiftly"
-    #     key: swift-${{ hashFiles('.swift-version') }}
-
     - name: Setup Environment
       shell: bash
       run: |
@@ -22,6 +15,10 @@ runs:
         echo "SWIFTLY_BIN_DIR=$SWIFTLY_BIN_DIR" >> $GITHUB_ENV
         echo "SWIFTLY_BIN_DIR=$SWIFTLY_BIN_DIR" >> $HOME/.bashrc
 
+        export SWIFTLY_TOOLCHAINS_DIR="$HOME/.local/share/swiftly/toolchains"
+        echo "SWIFTLY_TOOLCHAINS_DIR=$SWIFTLY_TOOLCHAINS_DIR" >> $GITHUB_ENV
+        echo "SWIFTLY_TOOLCHAINS_DIR=$SWIFTLY_TOOLCHAINS_DIR" >> $HOME/.bashrc
+
         echo "PATH=$SWIFTLY_BIN_DIR:$PATH" >> $GITHUB_ENV
         echo "PATH=\$SWIFTLY_BIN_DIR:\$PATH" >> $HOME/.bashrc
 
@@ -30,7 +27,7 @@ runs:
       id: cache-swift
       with:
         path: "~/.local/share/swiftly"
-        key: swift-${{ hashFiles('**/.swift-version') }}
+        key: swift-${{ hashFiles('**/.swift-version', '.github/actions/install-swift/action.yml') }}
 
     - name: Install `apt` Dependencies
       if: steps.cache-swift.outputs.cache-hit != 'true'
@@ -46,9 +43,11 @@ runs:
       if: steps.cache-swift.outputs.cache-hit != 'true'
       shell: bash
       run: |
+        SWIFTLY_VERSION=1.0.1
         UNAME=$(uname -m)
-        curl -O "https://download.swift.org/swiftly/linux/swiftly-$UNAME.tar.gz"
-        tar zxf "swiftly-$UNAME.tar.gz"
+        SWIFTLY_TGZ=swiftly-$SWIFTLY_VERSION-$UNAME.tar.gz
+        curl -O "https://download.swift.org/swiftly/linux/$SWIFTLY_TGZ"
+        tar zxf "$SWIFTLY_TGZ"
         ./swiftly init \
           --skip-install \
           --assume-yes \
@@ -65,7 +64,7 @@ runs:
       uses: actions/cache/save@v4
       with:
         path: "~/.local/share/swiftly"
-        key: swift-${{ hashFiles('**/.swift-version') }}
+        key: swift-${{ hashFiles('**/.swift-version', '.github/actions/install-swift/action.yml') }}
 
     - name: Print Swift Version
       shell: bash